03honakerss Posted October 28, 2011 Report Share Posted October 28, 2011 I just got pacesetter headers, 2 round magnaflow 4 x 14 mufflers and a x pipe. I ordered 2.5in stuff. Will it have a big power loss compared to a 3in exhaust? Also kinda debating on the cats im just doin bolt on stuff. This will prob be it other than a tune. Thanks for the info Quote Link to comment Share on other sites More sharing options...
Guest Jason* Posted October 28, 2011 Report Share Posted October 28, 2011 Unless you go with forced induction, you will notice no difference in flow/power. Even if you did have FI i've heard it's not a big difference. Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted October 31, 2011 Report Share Posted October 31, 2011 You will be fine.... Quote Link to comment Share on other sites More sharing options...
zippy Posted October 31, 2011 Report Share Posted October 31, 2011 I agree, if you're doing dual exhaust 2 1/2" that will be more than enough. Even for single exhaust 2 1/2" isn't going to kill it over a 3" much unless you're really moving some air. I've dyno'd the differences and you'd be surprised at what point it's actually a difference when you have a free flowing muffler. Header primary size is always a noticable difference, but header back size isn't as much of a difference. In the older days it was because mufflers didn't flow for crap and bigger was certainly better at that point. As an example a 6.0L with a tvs2300 with cam, headers, and 10psi of boost I was working with on the dyno made somewhere around 600RWHP (can't remember exactly anymore). The difference between the full exhaust with 2 1/2" mufflers and 3" full exhaust with mufflers was 2rwhp. Quote Link to comment Share on other sites More sharing options...
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