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Patriot Performance GM LS Series 5.3 L Head and Cam Kits 8420

Cylinder Head Combo, Heads, Roller Rockers, Roller Camshaft, Chevy, 5.3L, Kit

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Patriot Performance GM LS Series 5.3 L Head and Cam Kits

Brand: Patriot Performance

Manufacturer's Part Number: 8420

Part Type: Cylinder Head Combos

Product Line: Patriot Performance GM LS Series 5.3 L Head and Cam Kits

Summit Racing Part Number: PAR-8420

Camshaft Included: Yes

Intake Manifold Included: No

Fuel Delivery Style: Fuel injected

Timing Chain and Gears Included: No

Lifters Included: No

Gaskets Included: No

Cylinder Head Style: Assembled

Cylinder Head Material: Aluminum

Cylinder Head Finish: Natural

Combustion Chamber Volume (cc): 63

CNC-Machined Combustion Chamber: Yes

Combustion Chamber Style: Double quench

Intake Runner Volume (cc): 213cc

Exhaust Runner Volume (cc): 78cc

CNC-Machined Intake Runner: Yes

CNC-Machined Exhaust Runner: Yes

Intake Port Location: Standard

Intake Port Shape: Pent-roof

Exhaust Port Shape: D-port

Exhaust Port Location: Standard

Spark Plug Style: Angle

Intake Valves Included: Yes

Intake Valve Diameter (in): 2.020 in.

Exhaust Valves Included: Yes

Exhaust Valve Diameter (in): 1.570 in.

Valve Springs Included: Yes

Outside Diameter of Outer Spring (in): 1.285 in.

Damper Spring Included: Yes

Number of Springs Per Valve: Single

Retainers Included: Yes

Retainer Material: Titanium

Locks Included: Yes

Lock Style: 7 degree

Valve Stem Seals Included: Yes

Valve Stem Seal Style: Positive stop

Valve Stem Seal Material: PTFE

Rocker Arms Included: Yes

Rocker Arm Style: Full roller

Rocker Arm Studs Included: No

Rocker Arm Nuts Included: Yes

Guideplates Included: No

Pushrods Included: No

Valve Covers Included: No

Valve Cover Mounting Style: Centerbolt

Accessory Bolt Holes Drilled: Yes

Valve Guides Included: Yes

Valve Guide Material: Manganese bronze intake/Phosphorous bronze exhaust

Valve Seats Machined: Yes

Valve Seat Machine Style: 5-angle

Valve Seat Material: Steel

Steam Holes Drilled: No

Oiling Style: Through pushrod

Machined for O-Ring: No

Heat Crossover: No

Cylinder Head Bolts Included: No

Quantity: Sold as a kit.


In-Store Pickup: Choose In-store pick-up (OH, GA, NV) on our web site.

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These GM LS Series 5.3L head and cam kits from Patriot Performance are a knockout combination to up your performance. The heads are CNC-ported, and increase the compression on a stock LS short block. Ideal for street and strip, these heads supply a good HP gains, and can handle blown or nitrous applications.
* New GM raw 706 casting
* Precision welded combustion chambers
* Heat treated to OEM specs
* 5 axis CNC machined
* Hand detailed and assembled
* Patriot stainless valves
* Bronze guides
* Patriot Gold .650 in. dual springs
* Titanium retainers
* 5 angle valve job

These kits also include Patriot's own billet performance camshaft and shaft mounted roller rockers.


Some parts are not legal for sale or use in California on any pollution-controlled motor vehicles

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