I have a Stillen exhaust (muffler/rear section only) with the stock b-pipe. I'm about to get a resonated b-pipe from Warpspeed and I want to get a 2.5 inch diameter so that the whole system is 2.5. However, the guy at Warpspeed thinks that there is a possibility that the Stillen exhaust is only 2.25 diameter. Does anybody definitely know the diameter of the Stillen exhaust?

 

I called Stillen and Dean told me that it is 2.4 to 2.5 inches in diameter. Who knows though? I have little confidence in the average Stillen employee's knowledge.

 

Here's a good link to get you a 95% sure answer: http://www.greghome.com/Greg's%20Gar...%20Muffler.htm

Greg (author of site) indicates the Stillen muffler is a direct replacement to the oem. That leads me to believe it's a 2.25" dia.



left: Stillen
right: oem