so i am wanting to change the muffler out on the silverado. and like a dumbass i bought a 4.3 wondering what anyone has put on for an aftermarket. i want something to make a bit more power, and not sound like a turd on the v6 also. gonna add ram air, remove all the resonators off my intake pipe, and if i can (gotta find out) advance the timing a bit. (its got a distributor....) not sure if its adjustable or not. my buddy said there should be a tag on the stock air box which is at my dads house! any input is good!