I just don't want it to be loud. I've had enough loud exhaust on my WRX. it sounds great, but I just want some quiet for now...Originally Posted by DTR rex
as for the CAI, apparently on the new mustangs it's huge. There's some kind of restrictive "filter" in the intake hose (aside from the regular air filter), so for the most part, you're just removing all that crap and replacing it with one air filter. This causes all kinds of MAF sensor problems and can sometimes cause the ECU to go into "limp mode". For this reason, most 05+ Mustang CAI's come with the CAI and reflash. With all other things being stock, the CAI and reflash will get you a tick over 300 WHP, so yeah, that's a pretty significant gain....about 20-25 whp....from what I've been able to gather by reading other forums, you end up with about 300-305 whp and 320-325 wtq, and it still runs on 87 octane.
I actually felt really stupid going to a mustang forum and asking "which CAI should I get?"...but apparently that's a very fair question in the Mustang world. And the answer is C&L seems to have a pretty good combination produc....CAI and reflash for about $750.