GPI – Stage 1 – Ported OEM L92 / LS3 Heads


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Our 268CC LS3 head was developed specifically for the stock displacement LS engine to deliver improved cylinder fill in the lower RPM ranges while adding substantial airflow increase in the upper Ranges as well. Our testing has shown over 30 hp increase while improving torque below the curve

CLICK HERE to learn why GPI makes the best performing Cylinder Heads you can buy!

Refundable Core Charge *

We offer an optional Refundable Core Charge.

  • If you want to receive credit for your OEM heads – Let us know during checkout and when we receive your heads – we will refund you the $500 Core Charge.
  • If you want to keep your OEM heads, or don’t have a set – Inform us during checkout “Not sending in my heads”.

Additional information

Weight 24 lbs
Dimensions 26 × 12 × 12 in
Spring Set up and Assembly*

Yes, No Thanks


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