if frees up your exhaust flow so you get a little something... as to how much i cant really say. but it does make a difference. also gives it a deeper sound, depending on what muffler your running.
__________________ (Newer Motor [70,000 miles] Spectre Cold Air Intake, EGR Delete, AC Delete, Cat Delete, Flomaster 40 Series Muffler, Shortened Exhaust, American Racing Outlaw Series II Rims, Stalker Hood, Pioneer Deck Set, 12" Pyle Quoobz, Planet Audio Amp, [500 Watts Total]. Comp Cam [mild], Bored .30 over,
First On RaceDay | 
1993 mustang lx exaust 
