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88958758 - CNC LS3 Cylinder Head Assembly FREE Shipping

88958758
Availability: Backorder as of 3-28-14 No ETA
Shipping: FREE Shipping
Pricing: $598.50

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Description

88958758 CNC LS3 Cylinder Head Assembly Features:

The CNC-ported LS3 head features 276cc intake runners and 92cc exhaust ports, along with a combustion chamber volume of about 68.5cc. That's the same volume as stock LS3 heads, which maintains the stock compression ratio. It will fit any LS engine with cylinder bores of 4.000 inches or larger, including 6.2L L92 truck engines.

Each head is delivered fully assembled, with 2.165-inch hollow-stem intake valves and 1.59-inch solid-stem exhaust valves, as well as valve springs, valve locks, spring retainers and valve stem seals. The maximum recommended valve lift with the stock valvetrain components is 0.550-inch.

Aluminum performance head

  • Fits any LS family engine with 4.00" bore or larger
  • 2.165" hollow stem intake, and 1.59" solid stem exhaust valves
  • .550" max valve lift
  • CNC L92 style 276cc intake ports
  • D-shaped exhaust ports
  • CNC 68.5cc combustion chambers

Head 88958758 is assembled with the following components:

  • 12569427 Intake Valves
  • 10166344 Valve Spring Retainers
  • 12582719 Exhaust Valves
  • 12482063 Intake Valve Stem Seals
  • 12625033 Valve Springs
  • 12482062 Exhaust Valve Stem Seals
  • 10166345 Valve Locks

Lift .197" .315" .394" .512" .591"
Intake Flow 161 251 294 340 351
Exhaust Flow 127 186 222 247 252

 

LIFT (inch)
INTAKE
EXHAUST
0.039 27.612 21.037
0.079 60.714 44.679
0.118 87.3 75.053
0.157 124.341 103.872
0.197 161.414 127.083
0.236 195.628 147.451
0.276 223.566 167.097
0.315 251.641 186.501
0.354 275.218 206.322
0.394 294.406 222.84
0.433 311.917 234.353
0.472 327.475 242.617
0.512 340.917 247.045
0.551 348.538 249.514
0.591 351.323 252.371
0.63 359.135 255.246
0.669 365.137 257.451
0.709 361.738 259.69
0.748 364.504 260.962
0.787 369.196 262.666

Related Install Parts:
New Coil on Cover Holley Valve Covers
GM Performance LS Head Bolt Package
GM Performance LS Head Gaskets
GM LS Valve Cover Bolts with Seal
GM LS Valve Cover Gasket Seal
GM Performance Exhaust Manifold Gasket
GM Performance Intake Manifold Gasket Seal Kit

Shipping Information

  • Item Requires Shipping
  • 24.0 lbs.
  • W22.0000” x H7.0000” x L9.0000”
  • Free Shipping!
  • FREE Shipping

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