I have a 1975 GT celica with a 18in glass pack, and the core is 2in.
piping is 2in. Well the glass pack is sbout 15 years old.
well I'm going to put duals like a split off the pipe. Well I'm gong to put a 12in glass pack. Inlet I'm going up to a 2 1/4 in. and the core to a 4in. the muffler tip I'm going put on there is the PACESETTER BIG BORE MONZA TIPS Contains mini glass-paced resonators, for cars and trucks.
Yeah Its gonna sound good man I have a hedmann header, High flow cat and 2 inch pipe all the way back to a raven glasspack. The rumble is almost deafining inside the car
You should be happy with what your planning on doing dude