i have a b18b1 t3/t4...the downpipe and exhaust pipe (no cat) is 2.5 inches and i got a ractive muffler http://ractive.com/index.php?s...15,67 .....now im having second thoughts...just wanted some imput as to if this is an ok muffler or whatever. thanks.

 

i think the ractive muffler is a 2.25" inlet/outlet, so it would bottleneck from your 2.5" piping. go with a magnaflow muffler with a 2.5" inlet/outlet, its fairly inexpensive and sound good. I have one myself....