Quote:
Originally Posted by fooddude
What's your opinion of an aftermarket OP with the NA Stage2 tune? (or actually, your opinion on the OP in general).
Would it help anything significant? How much more whp do you think you can gain with the addition of an aftermarket Op on Stage2?
It looks like the Op doesn't really restrict anything compared to an aftermarket one - especially since the stock one doesn't have anything like a stock low-flow cat nor resonator or anything and isn't really that small in diameter, nor is it really that crooked nor sharp bent (oem one looks like it has pretty smooth/decent bends after you see pics of it with its' heat shields off).
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On a boosted setup you may see some improvement, but the only piece that will really net you some worthwhile power on NA as far as exhaust is the manifold itself. The OP simply isn't worth the cost.
Sincerely,
Delicious Tuning