you guys are starting to make me worry.3"magnaflow cat and 3"si/so muffler was going to be my next thing after i get my slotted and drilled rotors installed.(rotors should be here tomorrow.)i think our trucks are kinda wimpy out of the hole as it is.

 

Well, I'll take the increased gas mileage over the 'slight' drop in power- IF there was even a drop. For me, it feels like the power is the same, just that the tranny doesn't kickdown as readily anymore... which at times feels like it lost some power. However, I also have the 'death flash'- so I'm sure that doesn't help. A Superchips or SCT tuner is in my future- although- since I'm going to remainly fairly stock on the engine, it'll probably be the Superchips.

My exhaust is dual 2" into the Magnaflow cat, 2.5" single from cat, and 3" single after Flowmaster Delta 40 muffler; I definitely wouldn't go with a dual exhaust.