The cats are easily the most restrictive part of the exhaust. There are gains to be had ditching them whether your N/A or F/I.
HP gains from OR X/H pipe with VMP stage 2
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From my personal experience judging by the ole SOTP:
ORX= definite immediate gain throughout powerband that exceeded expectation
Gears (3.31 to 3.73)= could't really feel a difference, more shifting and whine noise introduced
Tuned CAI= negligible power difference, sounded cool
Tune- Definite power gains everywhere but not as much as anticipated (I've tried most of the big name tunes)
ORX= definite immediate gain throughout powerband that exceeded expectation
Gears (3.31 to 3.73)= could't really feel a difference, more shifting and whine noise introduced
Tuned CAI= negligible power difference, sounded cool
Tune- Definite power gains everywhere but not as much as anticipated (I've tried most of the big name tunes)
15whp is realistic, from what I have read . IMO less boost is less stress on the motor plus you are freeing up the flow of the system. Nice sound + 15whp .....hell ya it's worth it !
I was told 15hp. I have some cat deletes I'm going to try and it will be the only change so I will see what it picks up at the track. I may go back to the stock mufflers if my Roush mufflers are too loud with them. I have some other parts to test before this one
Let me know how it goes.
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