Can anyone say what the limit that a 2.5" downpipe will be in terms of hp/boost/flow? If I'm looking to push 300hp to the wheels at minimum, should I just look to go with a full 3" downpipe and be done with it?
I had one of the cheaper xspower 3" ones that mated to my de-catted and custom 2.5" exhaust system. Emphasis on had..with the moving of the car around from place to place on a wrecker over the years, it picked up legs and walked away.
Was considering the 2.5" dp from KO racing or the Aussie, which, if I can find it, is more $$.
For 300 whp, whatever you get should be fine 2.5" or 3". If you plan for more power down the road, a turbo kit would be a better investment. Saying you want over 300whp and using stock style turbos is an exercise in making life hard on yourself lol. Just my $0.02.