GPI – LS3 Intake Manifold Mod (Radius Rod Mod / Porting) w/ Heat Shield



In Stock


GPI’s Rod Mod Intake program:


  • We install radius bars to the LS3 manifold to help the air transition from the plenum to the runner.
  • Dyno tested to gain about 5 rwhp on bolt on cars and around 12 rwhp on cammed setups.
  • Porting the Manifold includes stand removal, and epoxying the manifold floor for maximum airflow (Optional).


This is the complete package to include porting and heat shield add-ons


We cover shipping to you, your core is sent back on your dime.

Price includes a 350.00 Core charge which will be refunded once GPI receives an acceptable core returned from you.


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