Anyone install the S&S exhaust header system on their M8 that allows you to use older style Twin Cam mufflers with same diameter openings? I plan on installing one on my 117” build with crusher mellow mufflers and wondering if others had any success....

 

No I haven't but that could be a good move from S&S for market share.

 

You might want to give this guy a call , He does a lot of testing on his M8 , I know he has that header on his list for testing but I don't know if he has found the time yet..
https://www.shefferperformancehd.com/