Order Status & Returns
Gift Cards
Help Center
1-800-345-4545
![Cylinder Head Kit for GM LS3 Engines [w/Head Studs]](https://www.jegs.com/images/mini_750/500/555/555-514050k2.jpg)
Vehicle Info NeededJEGSPART NUMBER: 555-514050K2
Cylinder Head Kit for GM LS3 Engines [w/Head Studs]
$1,76420
4 left in stock
Ships Today
Lowest Price GuaranteeRectangular Intake Ports
Cylinder Head KitGM LS3 Engines Includes:
- (2) Cylinder Heads
- (2) MLS Cylinder Head Gaskets
- Cylinder Head Stud Kit
- Valve Cover Seals
- Intake Seals
JEGS 555-514050K2 Cylinder Head Kit Includes:
- (2) JEGS Cylinder Heads for GM LS3 Engines, As-Cast 260cc Intake Runner 555-514050
- (2) JEGS MLS Cylinder Head Gaskets for GM LS Engines 555-210840
- (1) JEGS Cylinder Head Stud Kit for 1996-2007 GM LS Engines 555-83421
- (1) JEGS Valve Cover Seals for GM LS Engines, Pair 555-210870
- (1) JEGS Intake Seals for GM LS3 Engines, Set of 8 555-210801
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
Fully Assembled to Upgrade Your LS
JEGS LS Aluminum Cylinder Heads are the perfect replacement or upgrade for your LS-based engine. Starting with a new aluminum casting these heads are fully assembled with all new components including intake valves, exhaust valves, valve springs, retainers, guides, and seats. They are available in cathedral port and rectangular port designs to match your GM LS Engine needs.
Part TypeCylinder Head
Product LineJEGS GM LS Aluminum Cylinder Heads
BrandJEGS
Part CategoryReplacement Parts
Intake Port LocationStandard
Exhaust Valves IncludedYes
Locks IncludedYes
Engine Make/SizeGM LS3
Retainers IncludedYes
Intake Port ShapeRectangular
Guideplates IncludedNo
Rocker Arms IncludedNo
Oiling StyleThrough pushrod
Rocker Arm Nuts IncludedNo
Valve Seats MachinedYes
Intake Valve Angle15
Maximum Valve Lift0.57 in (14.478 mm)
Valve Seat MaterialSteel
Heat CrossoverNo
Number Of Springs Per ValveSingle
Valve Springs IncludedYes
Spark Plug StyleAngled
Exhaust Port ShapeD-Port
Damper Spring IncludedNo
Valve Guides IncludedYes
Intake Valves IncludedYes
Cylinder Head TypeRectangular Port
Valve Stem Seals IncludedYes
Intake Valve Diameter2.165 in (54.991 mm)
Exhaust Port LocationStandard
Valve Guide MaterialPowdered metal
Outside Diameter Of Outer Spring1.29 in (32.8 mm)
Combustion Chamber Volume (Cc)70
Machined For O-RingNo
Exhaust Valve Angle15
Steam Holes DrilledNo
Rocker Arm Studs IncludedNo
Part FitmentDirect Fit
Valve Cover Mounting StyleCenterbolt
Valve Stem Seal StylePositive stop
Retainer MaterialSteel
Intake Runner Volume (Cc)260
Exhaust Valve Diameter1.59 in (40.386 mm)
Package Qty1
Package TypeEA
No Questions
No Reviews
Items You Need
JEGS
Natural Aluminum Valve Covers/Coil Covers for GM Gen III/IV LS Engines
Part Number : 555-501092
$31599$416.99
You Save$101.00
JEGS
Retrofit Trunnion Kit for GM Gen III/IV LS, Gen V LT Engines
Part Number : 555-20920
$12329$133.99
You Save$10.70
![Fabricated Intake Manifold for GM LS3 and L92 [Black Aluminum]](https://www.jegs.com/images/mini_200/500/555/555-513066.jpg)
JEGS
Exhaust Header Gaskets for Chevy/GM LS1/LS2/LS3/LS6, 4.8L, 5.3L, 5.7L & 6.0L Engines
Part Number : 555-210850
$1999$22.99
You Save$3.00
JEGS
GM LS Engine Lift Plate LS Gen III & Gen IV Engines
Part Number : 555-80093
$7999$87.99
You Save$8.00
![16705 Service Pro Antifreeze Concentrate [1 gallon]](https://www.jegs.com/images/mini_200/700/708/708-16705.jpg)
![Racing Coolant and Antifreeze with LP-3 [1 Gallon]](https://www.jegs.com/images/mini_200/500/555/555-72316.jpg)
JEGS
Racing Coolant and Antifreeze with LP-3 [1 Gallon]
Part Number : 555-72316
$2526$36.99
You Save$11.73
![Racing Super Coolant Additive [16 oz.]](https://www.jegs.com/images/mini_200/500/555/555-72324.jpg)
![Ice Water Racing Coolant [1 Gallon, Non-Glycol]](https://www.jegs.com/images/mini_200/500/555/555-72314.jpg)
![Penetrating Oil [11 oz. Aerosol Can]](https://www.jegs.com/images/mini_200/600/639/639-11043.jpg)
![Brake and Parts Cleaner [14 oz. Aerosol Can]](https://www.jegs.com/images/mini_200/500/555/555-72312.jpg)
![Black RTV, Temperature Resistant up to 625 Degrees F [3.8 oz. Tube]](https://www.jegs.com/images/mini_200/500/555/555-28035.jpg)
JEGS
Black RTV, Temperature Resistant up to 625 Degrees F [3.8 oz. Tube]
Part Number : 555-28035
$799$8.99
You Save$1.00
![3-Ton Aluminum Floor Jack [6,000 lbs. Capacity]](https://www.jegs.com/images/mini_200/500/555/555-80077.jpg)
JEGS
3-Ton Aluminum Floor Jack [6,000 lbs. Capacity]
Part Number : 555-80077
$24999$285.99
You Save$36.00
JEGS
Part Number : 555-501092
$31599$416.99
You Save$101.00
JEGS
Part Number : 555-20920
$12329$133.99
You Save$10.70
Some parts are not legal for use in California or other states with similar laws / regulations
