Pro Circuit's full exhaust system for Trophy Karts are designed strictly for closed course competition. They feature a welded stainless steel end cap and meets AMA sound requirements of 94db. It's a three piece system and features a strong billet aluminum mounting bracket. The T-4R muffler is constructed of stainless steel. The T-4R does not have a spark arrester.

Newline Products M7 V.A.L.E.™ exhaust systems features a Teflon coated, blunted, cast magnesium outlet and a X-Lite™ retaining ring. These features not only look great, but also significantly reduce the weight of the exhaust system over OEM. The V.A.L.E.™ inlet design eliminates the use of springs and creates an adjustable mount that is rock solid when fixed in place. The system also features a precision mandrel bent header pipe for the Trophy Kart.

Thes mufflers uses a U.S.D.A. approved screen type spark arresters.