Some years ago Merlin Motorsport designed their own simple supplementary silencer/muffler. It’s a round box that has a 4in diameter, is 8in long, with a 2in perforation in the bore and is packed with E-Glass.

Merlin’s technicians weld a short length of exhaust tube at one end and slip it over the exhaust. The end cap on the opposite side is tacked on with four welds so it’s possible to grind out the weld and repack the E-Glass. See their MERLIN MUFFLER here.

The muffler can fit over the exhaust, in which case they’d advise a slot which allows it to slide over the exhaust and secure with a clamp. It can also be fitted inside the exhaust and secured by drilling a small hole and using a self-tapper.

If you do this though the scrutineer/noise meter man will require you to fit a hose clip around the exhaust tube and over the self-tapper to make sure that it does not vibrate out while on track.

You can read Merlin’s feature HOW MUCH NOISE WILL THE MUFFLER REMOVE? 

More information from or call 01249 782 101 ENDS.