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

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Gwatney Performance
  • 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).

Limited quantity of cores kept in house.


Add Intake Porting: *

Want to take your LS3 Intake Manifold to the limit? Porting the Manifold also includes stand removal, and epoxying the manifold floor for maximum airflow!

*We don’t recommend this for forced induction setups, as removing the stands decreases the structural rigidity of the manifold.

(Intake Porting is a very popular and time consuming process. Please allow extra time for shipment if selecting this option. They are fabricated on a per order basis.)

Add Intake Manifold Heat Shield

It works by shielding the intake manifold and reducing the heat radiating up from the top motor. This lowers intake manifold temperatures creating a more dense fuel and air mixture, creating more power. Think of it as an intercooler for your intake, same physics and chemistry just a different way to get there.

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