Anyone know the gains of a 4" exhaust system vs the factory 3.15"? I dont see too many people running a 4" DP outlet and catback. Curious as to why there isnt more people running this setup..
I just bought the catted ETS 4" downpipe. Im going to be buying their exhaust system soon just not sure if i want to run their muffler setup or resonators only.
I have a set of 19x11/19x9.5 Forgestar F14s on order and some H&R springs on the way. Probably go with a LG heritage spoiler and be close to done with it until the 21s can be tuned.