FMF Racing PowerCore 4 Slip-On 45135. The end result is a quality muffler with improved torque, increased horsepower and rugged durability all at a price that won’t break the bank. 2004 KTM 450. 2006 KTM 450.
Put it on my 04 KTM 450 SX and it sounds great. Solid exhaust. You may have to find your own rubber grommets if you don’t still have your stock stuff. This kit does not come with the grommets.