Description: Honda CRF150 (2003-05) Complete M-6 Stainless Steel/Aluminum Exhaust System Save weight, improve sound and gain power throughout the rev range with our race track proven Stainless Steel and aluminum exhaust system. Header Features:Mandrel bent thinwall (0.35? x 1.125?) satin finished stainless steel headpipeCNC machined stainless steel headpipe collarCNC machined aluminum headpipe flangeMuffler Features:Thinwall extruded 6061 T-6 polished aluminum sleeveTIG welded canister mount for easy installation and extreme durabilityCNC machined inlet cap1.5 x .035 stainless steel perf coreHigh temperature packing materialCNC machined & threaded outlet end for easy repackRemovable die-cast magnesium M6 outletUSFS approved spark arrestor included (removable)Optional sound reducing Mini MX P2 PowerTip (gold anodized) available, part # 005-P2Made, tested & assembled in Santa Ana, CA USA