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Chevrolet Performance Parts CNC-Ported LS3 Cylinder Heads 88958758

Chevrolet Performance 88958758 - Chevrolet Performance Parts CNC-Ported LS3 Cylinder Heads
  • Summit Racing: Choosing Cylinder Heads Part 1

    Summit Racing: Choosing Cylinder Heads Part 1

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Estimated Ship Date: 3/16/2015 (if ordered today) Would you rather pick it up? Select Location

  • Order this item and get free delivery and handling on your entire order! Oversize fees also waived on this item. Valid on orders shipped in the contiguous United States.

Brand: Chevrolet Performance

Manufacturer's Part Number: 88958758

Part Type: Cylinder Heads

Product Line: Chevrolet Performance Parts CNC-Ported LS3 Cylinder Heads

Summit Racing Part Number: NAL-88958758

Cylinder Head Style: Assembled

Cylinder Head Material: Aluminum

Cylinder Head Finish: Natural

Combustion Chamber Volume (cc): 68

CNC-Machined Combustion Chamber: Yes

Intake Runner Volume (cc): 276cc

Exhaust Runner Volume (cc): 92cc

CNC-Machined Intake Runner: Yes

CNC-Machined Exhaust Runner: Yes

Combustion Chamber Style: Open chamber

Intake Port Shape: Rectangular

Intake Port Location: Standard

Exhaust Port Shape: D-port

Exhaust Port Location: Standard

Intake Valves Included: Yes

Intake Valve Diameter (in): 2.165 in.

Exhaust Valves Included: Yes

Exhaust Valve Diameter (in): 1.590 in.

Valve Springs Included: Yes

Maximum Valve Lift (in): 0.550 in.

Damper Spring Included: No

Retainers Included: Yes

Locks Included: Yes

Valve Stem Seals Included: Yes

Rocker Arm Studs Included: No

Rocker Arms Included: No

Rocker Arm Nuts Included: No

Guideplates Included: No

Accessory Bolt Holes Drilled: Yes

Valve Guides Included: Yes

Valve Seats Machined: Yes

Steam Holes Drilled: No

Oiling Style: Through pushrod

Machined for O-Ring: No

Heat Crossover: No

Quantity: Sold individually.

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

Calculator Compression Calculator

These Chevrolet Performance Parts CNC-ported LS3 cylinder heads flow more than 350 cfm at 0.600 in. lift (intake side) at 28 in. of water restriction, or nearly 10 percent more than the stock casting. This promotes greater power across the rpm band and maximizes the advantage of additional performance parts, such as a larger camshaft and high-flow intake manifold. They feature 276cc intake runners and 92cc exhaust ports, along with a combustion chamber volume of 68cc. That's the same volume as stock LS3 cylinder heads, which maintain the stock compression ratio. The cylinder heads will fit any LS engine with cylinder bores of 4.000 in. or larger. The Chevrolet Performance Parts CNC-Ported LS3 cylinder heads are delivered fully assembled, with 2.165 in. hollow stem intake valves and 1.59 in. solid stem exhaust valves, as well as valve springs, valve locks, spring retainers, and valve stem seals.


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

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