Ditching the si/do setup for a si/so
#16
10-07-2005 | 12:38 AM
Senior Member
Joined: Apr 2001
Posts: 682
Likes: 0
From: Anderson. South Carolina, CSA
Originally Posted by mkinttrim
You still get some performance increase with a freeflow muffler even with stock pipes. After all you still have the stock pipes that lead up to it. In this case "bigger is not always better"
I replaced the stock muff with a free flowing muff myself. All I got was about 1 mpg better fuel mileage and louder sound. But the thing sounded completely crappy at high rpm's. The problem there was that with a freer flowing muff, I needed more air flow capacity AFTER the muff. The stock tailpipe accomidated only the air flow of the STOCK muff. The new muff allowed more air flow, so more air flow was needed AFTER the muff.
I ended up going with true duals with glasspacks and loved it! Gained 2 MPG and sounded absolutely fantanstic. (Fantastic meaning loud but not obnoxious, deep and gutteral with no popping or back-firing, audible but not overbearing in the cab)