GPI – Ported OEM LT1 / LT4 / L86 (Gen V) Cylinder Heads Package

(26 customer reviews)

From: $1,095.00

Gwatney Performance
  • Many hours of R&D have gone into the development of our incredible Gen 5 LT CNC program. With huge flow numbers and an efficient port shape, the GPI CNC ported Gen 5 LT1 / LT4 / L86 offering is truly bolt-on performance!
  • Intake Port Volume:  320cc
  • Exhaust Port Volume:  116cc
  • Our LT1 / LT4 / L86 head was developed specifically for the stock displacement LT 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 an over 30 hp increase while improving torque below the curve.

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