Zulu

What's the diameter of the stock exhaust and muffler system? I've got what looks to be the racing beat 84-85 GSL-SE headers & exhaust system with the factory connecting pipe, and the previous owner also put the stock muffler back on.

eddierotary

iTrader: (7)

2"

Zulu

So would there be any actual noticeable improvement aside from sound in moving from the stock muffler and piping to 2.25"?

eddierotary

iTrader: (7)

sound a bit loud now because is about 2 years old. but in the other hand it gave me about 12 hp because i eliminate the stock cat and run 2.25 from the manifold to a single dinomax cat and 2.25 from the cat to the dinomax ultraflo muffler

Zulu

well, I have no cats :p so that's why I'm wondering if going from the 2" stocker to a 2.25" aftermarket muffler and associated piping up the the remainder of the racingbeat unit would actually produce any gains

eddierotary

iTrader: (7)

well if you want to have a loud exaust upgrade it to 2.25" or 2.5" but if your concern about noise, your best bet is racing beat muffer

mwpayne

Ok, so where's the happy medium? I want a nice sound and max performance, so a 2.5" piping, no cat, and a
(insert brand here) muffler and stock header-how would that work out?