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Hi guys,
I took my car the do the uprev. when dyno the car, it deviled 230 HP which is very low.
the car has (Stillen headers, Nismo cat back system, K&N typhoon air intake, and last thin I installed is MOTORDYNE M370 Intake Manifold)

What do you think is wrong. The uprev tech said it might be the catelac converters. Because I have stock? Could it be the problem.

I will install MOTORYDYNE ART test pipe.

What do you thinks guys