L59 engine specs

Part Make Model Tutorial Link; engine, electrical, cooling: GM: LSx, LS2, LS3, V8: stop overheating, cooling engine, electrical work: HotRod: Rear end, differential

L59 engine specs. The oil pump assembly should be tightened down to the engine block using 18 ft-lbs. The pumps cover bolts can be installed after lubing up the oil pump gear. The oil pump cover bolts torque down to 8 ft-lbs. On the bottom end of the pump the pickup tube can be installed and torqued down to the pump using 8 ft-lbs.

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Buick car models come in all shapes and price ranges. See pictures and learn about the specs, features and history of Buick car models. Advertisement Buick models come in all shape...EV6 / USCAR. 12609749. 54 lb/hr @ 58 psi. L94. EV6 / USCAR. 12609749. 54 lb/hr @ 58 psi. From left to right: original Bosch Jetronic EV1, the tall LS1 style followed by the early LS truck injector, and on the far right the late LS3 EV6 style. The one missing version is the late truck injector that is the same height as the early truck LS piece ... A 96.0 mm (3.78 in) cylinder bore and 92.0 mm (3.62 in) piston stroke give the L59 engine a total of 5.3 L (325 CID) of displacement. The compression ratio rating is 9.5:1. The engine used a cast-iron cylinder block with 111.76 mm (4.40 in) of bore spacing. The Vortec 5300 L59 is equipped with dish pistons that are made of cast aluminum alloy ... Buick car models come in all shapes and price ranges. See pictures and learn about the specs, features and history of Buick car models. Advertisement Buick models come in all shape...Chevy LM4 5.3 Vortec 5300 Engine Specs, Problems And Reliability. Having a capacity of 5.3 liters (325 cu in), GM/Chevrolet LM4 is a naturally aspirated V8 90° 4-stroke gasoline motor. It’s a representative of Generation Three V8 truck motors with small blocks. LM4 resembles LM7 (released between 2003 and 2005), but it differs by having an ...

L59: EV6 / USCAR: 12580426 25326903: 33 ... LS1/LS6 and Vortec Truck Engines as well as Gen IV (58x) LS2, LS3, LS7, & Vortec and GEN V LT / ECOTEC3 Engines. All PSI ...History of the L79 327 Engine and L79 Production Numbers. First installed into GM cars in 1965, the L79 engine was a powerhouse for the masses. This mouse motor boasted 350hp and 360 lb-ft of torque, though there is also a 325 hp version of the L79 as well. Unlike the L76 Corvette-only 327, the L79 327 was available in quite a few GM …The oil pump assembly should be tightened down to the engine block using 18 ft-lbs. The pumps cover bolts can be installed after lubing up the oil pump gear. The oil pump cover bolts torque down to 8 ft-lbs. On the bottom end of the pump the pickup tube can be installed and torqued down to the pump using 8 ft-lbs.The L59 engine is a 5.3L Gen. III iron-block engine uses in GM trucks and SUVs between 2002 and 2007. He is essentially the flex-fuel execution of that LM7. For business purposes, it was also known as the Vortec 5300. The engine specs and information listed here is for a stock L59 power.L59 Engine Specs (VIN "Z") The information listed here is for the stock engine. Performance Specifications. Compression Ratio. 9.5:1. Horsepower Rating. 285-295 hp. Torque Rating. 320-335 ft./lbs. L59: EV6 / USCAR: 12580426 25326903: 33 ... LS1/LS6 and Vortec Truck Engines as well as Gen IV (58x) LS2, LS3, LS7, & Vortec and GEN V LT / ECOTEC3 Engines. All PSI ...

The LM7 (along with its L59 FlexFuel E85-capable brother) are the Gen. III, 5.3L iron block truck engines you can pick up in wrecking yards for about $600. ... LM7 5.3L Vortec 5300 Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More.] ...The GM Generation III & IV Engine. It takes serious guts to replace the most famous engine of all time. Since 1955 GM had been building is Chevrolet Small Block V8 with accolades, respect and awards in the automotive press and racing and with commercial success with customers in marine, industrial and mainstream automotive markets. The …[Editor’s Note: This L59 engine upgrade guide is part of a series of LS engine upgrade guides assembled by a team of LS experts at Summit Racing that we are sharing at SpeedArticle. For a primer on the entire LS engine universe, read LS Engines 101: An Introductory Overview of the Gen III/IV LS Engine Family.] … Intro to L59 EnginesSep 21, 2017 · Much like that very realistic scenario, Chevy’s L76 and L77 engines are actually LS engines. And though the majority of people might call them Vortec engines, GM’s small-block 4.8L, 5.3L, 6.0L, and 6.2L truck engines from 1997 through Gen IV are still very much members of the LS engine family. The LS1 was the first mill from GM’s Gen III ... Aero L-159 Alca. The Aero L-59 Super Albatros is a military jet trainer produced by the Czechoslovakian aerospace manufacturer Aero Vodochody. It was developed from the firm's earlier and highly successful L-39 Albatros series. Being based on the L-39, it shares numerous similarities; in comparison to its predecessor, the L-59 featured a ...LS1 Cylinder Head Specs. 1997-1998 Casting Numbers (Perimeter Valve Cover Bolts) 10215339, 12550592, 12558806. 1999-2004 Casting Numbers (Center Valve Cover Bolts) 12559853, 12558805, 12560621, 12562174, 12564241. Material.

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GM’s 5.3L Vortec engine suffers from common problems including: oil consumption caused by AFM, cracked cylinder heads, spark plug failure, intake manifold problems, and fuel pressure regulator failure. Despite these problems, the 5.3 Vortec is an extremely reliable engine. They are getting older nowadays, having been in production from 1999 ...The GM LM7 (Vortec 5300) features V8 90° cast-iron cylinder block with a five-bearings crankshaft, two aluminum heads, a single one-piece cast camshaft and two valves per cylinder (16 in total). The LM7 has a sequential multi-port fuel injection system and 78.0 mm (3.07 in) throttle body. The engine used a “Coil-Near-Plugs” ignition system.Aug 29, 2022 · The 5.3 liter LS-series engine was offered from 1999-2014 and has a 3.78” bore x 3.62” stroke. The block was offered in both cast-iron and aluminum with aluminum cylinder heads. Camshaft specifications varied depending on the year and RPO code of the engine. Part Make Model Tutorial Link; engine, electrical, cooling: GM: LSx, LS2, LS3, V8: stop overheating, cooling engine, electrical work: HotRod: Rear end, differentialMar 16, 2007 · The Vortec 5300, or LM7/LM4/L59, is a V8 truck engine. It is a stroked (by 9 mm) version of the Vortec 4800 and replaced the 5700 L31 in 2003. L59 denotes a flexible fuel version, while the LM7 is a special low-emissions engine. The L33 is made for the pickup trucks. All Vortec 5300s are based on the new Generation III small-block V8.

75% more engine protection against horsepower loss and wear. 1; 50% more cleaning power vs. AMSOIL OE Motor Oil; Protects turbochargers 72% better than required 2 by the GM dexos1 Gen 2 specification. 28% more acid-neutralizing power than Mobil 1. 3; Trusted by professional engine builders; Guaranteed protection for up to 25,000 miles or 1 yearSpecs: 217/23x .619"/.607" 114LSA, 3 Bolt Pattern The Hot Rod cam is BTR's newest offering for 4.8L 5.3L 5.7L 6.0L displacement LS-based truck engines. This camshaft delivers an aggressive idle while maintaining good street manners.The 3.78 in. bore blocks (4.8L & 5.3L) are an updated version of the Gen III engines but with Generation IV updates and capabilities. This family was mainly used in trucks; however, a modified version was used in a few front-wheel-drive cars. This 4.125 in. bore block (7.0L) was inspired by the performance and size of the LS1 and was designed ...The Vortec 5300, or LM7/L59/LM4, is a V8 truck engine. It is a longer-stroked by 9 mm (0.35 in) version of the Vortec 4800 and replaced the L31. L59 denoted a flexible fuelversion of the standard fuel LM7 engine. Displacement is 5,327 cc (5.3 L; 325.1 cu in) from a bore and stroke of 96 mm × 92 mm (3.78 in × 3.62 in).17801267. LS2. The first of the Gen IV small-blocks, the 400hp LS2 was first unveiled in the '05 Corvette. Compared to its LS1 and LS6 forbears, it boasted a larger 4.000-inch bore while retaining ...Method 1: Use search engines. One simple tool that helps you find the engine specs of a specific vehicle is search engines like Google and Bing. You may search for its year & make or VIN as per the information you have in hand. 1. Search by the year & make. If you’re not sure about the VIN, you can also search by its year, make, and model.Apr 4, 2019 · The minimum recommended clearance is 0.035-inch, so you should be able to deck most blocks 0.010-inch without a problem, but be sure to check the piston protrusion before you install the heads. If ... The oil pump assembly should be tightened down to the engine block using 18 ft-lbs. The pumps cover bolts can be installed after lubing up the oil pump gear. The oil pump cover bolts torque down to 8 ft-lbs. On the bottom end of the pump the pickup tube can be installed and torqued down to the pump using 8 ft-lbs.Crate Engines, GM LM7/LS1 347CI 500 HP Stage 1 Long Block, 5.7L/347, Assembled, Internal Balance, Aluminum Heads, Chevrolet, Small Block LS, Each. Part Number: HPE-LM7-LB-2. Not Yet Reviewed. Estimated Ship Date: Jul 8, 2024 if ordered today. Core Charge $225.00; Free Shipping; Special Order

Mar 4, 2021 · The Vortec 5300 came in a few different variants; The LM7, LM4, L33, and the L59. The LM7 Vortec 5300 is the truck-use variant of the LS engines found in Corvettes and Camaros. Unlike the LS engines, though, the LM7 engine block is composed of cast iron rather than aluminum. The cylinder heads, however, are aluminum.

The LM4 is a 5.3L, Gen. 3 small block engine used in GM trucks between 2003 and 2005. It’s is very similar to the LM7, except that it’s built on an aluminum block, and the LM7 is an iron-block engine. For marketing purposes, the LM4—like the LM7—was also known as the Vortec 5300. The engine specs and information listed here is for the ...3 yr./ 36000 mi. Power / Horsepower. 285 HP @ 5200 rpm. Torque. 325 ft-lb @ 4000 rpm. MPG (Economy) 15 city / 18 highway. Curb Weight. 4,769 lbs.These GMC Yukon SLT 5.3L V8 with L59 engine serial nr. performance sparkplugs are designed to help you Revamp Performance Potential, low- and mid-range torque, kick-out time and acceleration to further Bump Up fuel burn. Our GMC Yukon SLT 5.3L V8 with L59 engine serial nr. racing series spark plugs' design ensures optimum mix ignition in the ...Apr 1, 2018 · 15 posts · Joined 2017. #1 · Apr 1, 2018. Ok is reserched a good bit about the swap. Just lookin for some extra insight. My truck had the L59 cast block with 706 heads and of course the smaller truck intake. Has had a rough life (previous owners). Pritty sure it has the Castech crack on driver side and lifters seem to be failing. Plentiful, inexpensive 4.8L and 5.3L iron truck blocks are common as dirt and usually have sufficient wall thickness to accept at least a 0.118-inch overbore (with about a 0.020 "safety margin ...Engine . Number Of Cylinders. 4. Gross Power. 59 hp. Net Power. 57 hp. Power Measured @ 2700 rpm. Displacement. 148.5 cu in. ... OEM specifications are provided for ...[Editor’s Note: This L59 engine upgrade guide is part of a series of LS engine upgrade guides assembled by a team of LS experts at Summit Racing that we …l59 z 285-295 5.3l 3.780 3.620 lm4 p 290 5.3l 3.780 3.620 lq4 u 300-325 6.0l 4.000 3.620 0.051 4.039 10.7 oe# 12589227 28-12589227 lq9 n 345 6.0l 4.000 3.620 26192 pt/54445 ... engine pro performance gm ls and lt cylinder head gasket chart enginepro.com engineproshopsolutions.com.

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Quick Specs. Gas Mileage 14 mpg City/19 mpg Hwy. Engine Gas/Ethanol V8, 5.3L. EPA Class No Data. Style Name 1500 2WD Crew Cab LS. Drivetrain Rear Wheel Drive. Passenger Capacity 6. Engine Specs Type: V8 Valve Location: In Head Bore / Stroke: 3.875" / 3.00" Displacement: 283 Cubic Inches Compression Ratio: 9.5 : 1 Crankshaft Material: Forged Steel Camshaft Material: Cast Alloy Iron Oil Pump Type: Gear Normal Oil Pressure 35 psi @ 2,000 RPM Oil Pressure Gauge Electric Mar 4, 2021 · The Vortec 5300 came in a few different variants; The LM7, LM4, L33, and the L59. The LM7 Vortec 5300 is the truck-use variant of the LS engines found in Corvettes and Camaros. Unlike the LS engines, though, the LM7 engine block is composed of cast iron rather than aluminum. The cylinder heads, however, are aluminum. 5.3L Vortec Engine Performance and Specs. The 5.3 Vortec, also known as the LM7, could produce 270 HP and 316 pounds per foot of torque. Before GM phased out the Gen III model engine, they replaced it with the L33. Then, they marketed it as a version of the 5.3 Vortec with a higher output able to pump out 310 HP with 335 pounds per foot of torque.[Editor’s Note: This L59 engine upgrade guide is part of a series of LS engine upgrade guides assembled by a team of LS experts at Summit Racing that we …The 5.3 Liter Vortec engine by General Motors is based on the small block V8 platform. This is the same platform used for producing many of the LS series engines that were …This page contains information about GM's 5.7-liter V8 LS6 Small Block engine, including specifications, horsepower, torque, vehicle applications and more. ... 5.3 V8 L59; 5.3 V8 LM4; 5.3 V8 L33 ...Oil is especially interesting as it is deemed the cheapest. Cheap is cheap for a reason. Since the start of the year, all investors have been inundated by calls to buy the value st... ….

L59: EV6 / USCAR: 12580426 25326903: 33 lb/hr @ 50 psi, Return Style (02-04) 36.6 lb/hr @ 58 psi, Returnless (05-07) LQ4: Multec: ... Dakota Digital Gauges, HPTuners and PCM programming, Fuel Pump Kits, Engine Sensors, Extension Harnesses, Replacement GM connector pigtails and a complete line of hardware to complete your conversion needs! …Ultimately, the LS head bolt torque specs are pretty difficult to explain without a proper demonstration. Still, we can say that the third-gen LS engines (LS1 and LS6) are 22 ft-lb for the first pass (bolts 1-10), 90° for the second pass (bolts 1-10), 90° for the third pass (bolts 1-5), and 50° (bolts 6-10). And for the fourth pass, you ...The L59 engine is a 5.3L Gen. III iron-block engine use in GM trucks and SUVs between 2002 the 2007. ... Piston Heads, Cam Specs & More. Posted 10/04/18 through ...A large number of 5.3 swaps make use of the Gen III LM7 engine, which offered between 270 and 295 hp and was sold from 1999 to 2007 across a wide range of Chevrolets and GMCs. Factory torque checked in as high as 335 lb-ft or as low as 315 lb-ft. There are, of course, a number of early 5.3-liter LS variants, including the flex-fuel L59 …Vehicle is a 2005 Chevrolet Suburban 5.3l 4wd Vin Z L59 engine and P59 pcm. I recently pulled the engine and replaced all the leaking gaskets top to bottom with exception of the head gasket as I didn't want to go that far into the engine. ... Cam specs: Stage 2 LS Truck Swap Cam, 218/227 112+2, .523/.524 Lift Now on to the issue I've …Engine Specifications: Engine code: GM / Chevy L59 (Vortec 5300) Layout: Four stroke, V8: Fuel type: Regular unleaded and …L59: EV6 / USCAR: 12580426 25326903: 33 lb/hr @ 50 psi, Return Style (02-04) 36.6 lb/hr @ 58 psi, Returnless (05-07) LQ4: Multec: ... Dakota Digital Gauges, HPTuners and PCM programming, Fuel Pump Kits, Engine Sensors, Extension Harnesses, Replacement GM connector pigtails and a complete line of hardware to complete your conversion needs! …The Vortec 5300, or LM7/L59/LM4, is a V8 truck engine. It is a longer-stroked by 9 mm (0.35 in) version of the Vortec 4800 and replaced the L31. L59 denoted a flexible-fuel …Search Form. Recent Searches. Hot Rods and Muscle Cars; Old Motorcycles; Articles. Tech. Brakes & Suspension; Cooling; Driveline L59 engine specs, [Editor’s Note: This L59 engine upgrade guide is part of a series of LS engine upgrade guides assembled by a team of LS experts at Summit Racing that we …, The L59 engine is a 5.3L Gen. III iron-block engine use in GM trucks and SUVs between 2002 the 2007. ... Piston Heads, Cam Specs & More. Posted 10/04/18 through ..., The Vortec 5300, or LM7/L59/LM4, is a V8 truck engine. It is a longer-stroked by 9 mm (0.35 in) version of the Vortec 4800 and replaced the L31. L59 denoted a flexible-fuel …, The L59 engine is a 5.3L Gen. III iron-block engine uses in GM trucks and SUVs between 2002 and 2007. He is essentially the flex-fuel execution of that LM7. For …, L59: EV6 / USCAR: 12580426 25326903: 33 ... LS1/LS6 and Vortec Truck Engines as well as Gen IV (58x) LS2, LS3, LS7, & Vortec and GEN V LT / ECOTEC3 Engines. All PSI ... , Engine Block Specifications. Casting Numbers: 12567392, 12567393, 12551358. Material: Iron. Displacement: 5.3L / 325 cid. Bore Dia. 3.780 in. Stroke: 3.622 in. Deck Height: 9.230-9.240 in. Bore Spacing: 4.400 in. Thrust Bearing Location #3 Main. Main Cap Style: 6-Bolt. Main Housing Bore Diameter: 2.751 in. Cam Housing Bore Diameter , The L96 engine is a 6.0L Gen. 4 small block engine used in GM trucks and SUVs from 2010 to 2017. It replaced the LY6 and added Flex Fuel capability. For marketing purposes, it was also known as the Vortec 6000. The engine specs and information listed here is for a stock L96 engine. Mechanically similar, General Motors’ LS and LS-based …, 3 yr./ 36000 mi. Power / Horsepower. 285 HP @ 5200 rpm. Torque. 325 ft-lb @ 4000 rpm. MPG (Economy) 14 city / 17 highway. Curb Weight. 5,050 lbs., All LM7 and L59 engines had a crankshaft with a 0.857 in. rear flange. (Casting #12552216) In 2001, the LR4 and LM7 were upgraded with MLS gaskets. The L59 was first built after the upgrade. It always had MLS gaskets. The 1999-2003 LR4 and LM7 had a return-style fuel injection system. They went returnless in 2004 (except the Express ..., LM4 - Aluminum Version of Standard 5.3L. The LM4 is essential all the same as a standard LM7 but with an aluminum block. Be careful when searching for engines. Many see the aluminum block and assume its an L33. The biggest giveaway with an LM4 is there is a giant hole through the oil pan for the front axle of the Trailblazer and Envoy that they ..., LM4, LM7, L33, L59 — BD Turnkey Engines LLC, Chevrolet Silverado 1500 L33 Engine All other parts that may be provided are . Home; Home › ls l33 specs › LM4, LM7, L33, L59 — BD Turnkey Engines LLC ... GM Chevy L33 Vortec 5300 HO V8 engine: review and specs. 19367775 2001-2004 (LM7) Remanufactured Engine GM (General Motors) ..., Fights sludge and deposits with 100% synthetic formulation.; 47% more wear protection 1 than required by the GM dexos1 Gen 2 specification.; 100% protection against LSPI 2 in the engine test required by the GM dexos1 Gen 2 specification.; 1 Based on independent testing of OE 0W-20 in the Peugeot TU3M Wear Test as required by the dexos1 Gen 2 …, An L59 engine is equipped with 285 – 295 horsepower output and 320 – 335 ft-lbs torque output, respectively. The 9.5:1 compression ratio also assists in the …, Ford cars come in all shapes and price ranges. See pictures and learn about the specs, features and history of Ford car models. Advertisement Ford models come in all shapes and pri..., The GM / Chevy L33 HO is a 5.3 l (325 cu.in.) natural aspirated V8 90° four-stroke gasoline engine from a Generation III small block V8 truck engine series. The L33 engine is an aluminum block version of the LM7 and it was produced from 2005 to 2007. The L33 engine with VIN code “B” is also called the Vortec 5300 HO. The GM L33 features V8 90° …, To ensure you’re using the the right parts, you need to know which LS engine you’re starting with. There are two easy ways: 1. The 8th digit of the VIN. 2. By visual inspection. The easiest way to tell the difference is to check the 8th digit of the Vehicle Identification Number (VIN) on the original vehicle. (See below.), L59 had a remarkable 285-295 horsepower and 320 meters range of torque. LM7 generates 270 to 295 horsepower and 315 to 335 meters high of torque. Although the difference in …, Oct 12, 2017 · LS1 Cylinder Head Specs. 1997-1998 Casting Numbers (Perimeter Valve Cover Bolts) 10215339, 12550592, 12558806. 1999-2004 Casting Numbers (Center Valve Cover Bolts) 12559853, 12558805, 12560621, 12562174, 12564241. Material. , The oil pump assembly should be tightened down to the engine block using 18 ft-lbs. The pumps cover bolts can be installed after lubing up the oil pump gear. The oil pump cover bolts torque down to 8 ft-lbs. On the bottom end of the pump the pickup tube can be installed and torqued down to the pump using 8 ft-lbs., The 1987 Buick Grand National coupe uses a turbocharged 3.8-liter V-6 engine codenamed the LC2 that produces 245 peak horsepower and 355 foot-pounds of torque., Engine code: Displacement: Power output: Straight-4: Family I: GM / Chevy 2H0: 1.8 l: 140 PS; 103 kW; 138 HP: Family II: Daewoo / Chevy X20SED: 2.0 l: 90 PS; 66 kW; 89 HP, Although the LQ9 engine specs and the LQ4 come with several similarities, the LQ9 is built with stronger rods. The rods have the capacity to bend and retain their original state instead of breaking. While the LQ4 comes with weaker rods and a piston setup with a pressed pin, the 123/145 casting on the LQ9 rod is designed with a relatively ..., Learn how to improve the power and torque of your L59 5.3L engine, a Gen. III iron block truck engine that was made from 2002 to 2007. Find out the best cam, inta…, Horizontal Threaded Crankshaft − .002 − .008”. Horizontal Threaded Crankshaft − .002 − .008”. Horizontal Threaded Crankshaft − .002 − .008”. Both Rod Screws Same Size: Torque to 185 In. Lbs. ** Torque Small Rod Screw First: 160 In. Lbs. Torque Large Rod Screw Second: 260 In. Lbs. Clearance With Valve Springs Installed ..., The GM / Chevy L33 HO is a 5.3 l (325 cu.in.) natural aspirated V8 90° four-stroke gasoline engine from a Generation III small block V8 truck engine series. The L33 engine is an aluminum block version of the LM7 and it was produced from 2005 to 2007. The L33 engine with VIN code “B” is also called the Vortec 5300 HO. The GM L33 features V8 90° …, Everybody loves free things. And they're easier to find than you'd think! Here's a list of the top 50 free items you can get this year. What’s that you say? You like free things? W..., General information. Cylinder block. The GM LM7 Vortec has a cast-iron cylinder block with a five-bearings crankshaft supported system. The crankshaft journal diameter is 65.0 …, A large number of 5.3 swaps make use of the Gen III LM7 engine, which offered between 270 and 295 hp and was sold from 1999 to 2007 across a wide range of Chevrolets and GMCs. Factory torque checked in as high as 335 lb-ft or as low as 315 lb-ft. There are, of course, a number of early 5.3-liter LS variants, including the flex-fuel L59 …, Engine:5.3 with DOD Delete, TSP Long tube headers, BTR Stage 2 cam, AEM Cold Air Intake ... 5.3L Vortec Gen III Engine Specs LM7 L33 L59 Horsepower: 285 hp @ 5200 RPM 310 hp @ 5200 RPM 295 hp @ 5200 RPM Torque: 325 lb.-ft. @ 4000 RPM 335 lb.-ft ..., As of 2014, NASCAR mandated specifications include a carbureted V8 engine with a maximum 5.9-liter capacity (358 cubic inches). The current limitations are designed to encourage th..., The Vortec 5300 came in a few different variants; The LM7, LM4, L33, and the L59. The LM7 Vortec 5300 is the truck-use variant of the LS engines found in Corvettes and Camaros. Unlike the LS engines, though, the LM7 engine block is composed of cast iron rather than aluminum. The cylinder heads, however, are aluminum., The LS1 has 67.3cc chambers with 2.00/1.55-inch valves. Meanwhile, the "852" and "706" heads from the 4.8L/5.3L have 61.15cc chambers and 1.89/1.55-inch valves. These are more suited to high ..., These GMC Yukon SLT 5.3L V8 with L59 engine serial nr. performance sparkplugs are designed to help you Revamp Performance Potential, low- and mid-range torque, kick-out time and acceleration to further Bump Up fuel burn. Our GMC Yukon SLT 5.3L V8 with L59 engine serial nr. racing series spark plugs' design ensures optimum mix ignition in the ...