I have a 91 TBI Firebird, and want to buy a good muffler, not going 4 the cat back right now cause i might sell it.
I want to know who makes a really good sounding, good hp gain muffler.
I want a good deep muscular sound, louder then stock(obviously), and don't want the "pop" when i let off the throttle.
I also want the stock exits, what size r they anyway?
Any suggestions, or better muffler, and part numbers.
thanks

 

I recently put on an Edelbrock RPM Series muffler (part number 5544 offset inlet and offset outlet, 2.5" both ends) and a regular glasspack downstream. Wicked sound! Not raspy at all. Nice and rumbly but quieter than a three chambered Flowmaster.