Quote Originally Posted by Strat Fan View Post
Weld the super trap to a secondary trumpet which slides up inside of the trumpet already fitted on your exhaust. Drill 1 hole in the underside of your existing trumpet/tailpipe & fit a rivnut or weldnut into the trumpet you are inserting to bolt the super trap in place.
Simple.
Thanks Craig. I am resolved to a longer term solution of a different back box design that can take track-day mufflers if necessary. My current box sounds superb but is in mild steel and was built in 1992 so time for a change....