I had Flowmaster's installed in place of my stock mufflers at our local muffler shop, $180. Problem is, with an automatic the 40 series Delta Flows are too loud inside, if you want to hear the Mach 460 you dont want Flowmasters.
The guy traded me up to Borla's for $60 more and the inside noise is tolerable, outside is a little louder than stock, sounds good. The power difference was awesome, though, more than with the Flowmasters.
Also, I installed a Cold Air Intake, not expecting much, but really surprised at the power gain. My car is a 97, built before they started adding factory horsepower to the 4.6, I think it was rated at 205 hp factory.
__________________
Harold Phillips
www.mustangsofeasttexas.org
1997 Mustang GT Convertible, 4.6L Auto, Autumn Orange w/Saddle Tan Top & Leather Interior, Styling Bar, 17 X 9 Polished Cobra R's on Nitto NT 555's, Ford Racing Bullitt Suspension package, Mac CAI, Steeda UDP's, Flowmaster 40 Series Catback, SCT X-Calibrator II, Zaino Shine, 7 time Show Winner, driven daily 
|