STILLEN Exhaust & Gen 3 Intake Dynos - 18hp Each!

Denny McLain

The lots of noise just comes from removing and replacing the stock cats. Honestly surprised as to the decibel difference in higher kpa throttle positions. At lighter throttle you can't tell the difference. Acts/Sounds a bit like an exhaust system that uses a valve to bypass a portion of the muffler.

My experience is intake insufficiencies choke the car at higher rpm where addition cfm is necessary. If there is a flow issue on the stock intake, it will show up on the dyno particularly on the top end. Read where another brand of intake is able to fool the MAF, therefore leaning out the car. Being these cars are very rich from the factory, it would show up during the entire powerband and on the wideband 02 readings.

My intent is certainly tuning software as unquestionable there would be gains in setting up proper/fuel air and perhaps some from timing. If the intake gains are from leaning out the motor vs required additional cfm; then for someone like me with intent of ECU tuning, it would be false gains. However, if someone's intent is to just add bolt ons with no tuning....... then it would be a great addition.

Again......dyno's don't lie. We'll see what it says this week.