Webstang11

Hey everyone I was looking to add the Roush CAI to my 2007 mustang gt! is it worth it? are their any improvements in sound? and any other major improvements? THANKS

427Roush

I picked up a Roush CAI with a 2.57" pulley and tune from JDM. The package also included one piece Brisk plugs. The S/C whine is much louder at wide open throttle.
There are other less expensive CAIs out there but wanted to keep my 427R improved with all Roush parts.

kenthicken

I would get the CAI and the proper tune from someone like VMP, Brenspeed or JDM. Whatever you do, do NOT put on the CAI without a tune, or you're looking at a world of hurt later on. Spend the extra money on the proper tune.

Roy_R

It's not worth it....you already gained the HP from the M90.

kenthicken

There is still more HP there to unlock. M90 from Roush is advertised at 435 HP. With the right tune, pulley and mods, 475 is achievable, but may run in to some heat soak issues (from what I've read).

427Roush

Roush re-flashed my ECU after buying their CAI. It was part of the purchase package. My dyno test was 365 RWHP before and 390 RWHP afterwards.
A tune from JDM or VMP will unleash the beast even more and are pretty safe per Roush forums.
Probably won't have heat soak if a smaller pulley isn't used. At least I don't after HPDE days here in Nor Cal.