- Our 268CC LS3 / L92 / L99 / LSA 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
Refundable Core Charge *
GPI offers an optional Refundable Core Charge.
- If you want to receive credit for your OEM heads – Make a note during checkout that you will send us your OEM heads and when we receive your heads – we will refund you the $500 Core Charge.
Please contact us for specific build instructions prior to ordering this product