In terms of engineering and design

Laser engraved logo on the outer muffler sleeve and type approval number on the inner sidecomplete the product

Made from 6061 aluminum

Extended fuel mixture screw includes all the necessary parts replace the OEM style fuel mixture with an extended screw for easier tuning

Designed to deliver high levels of performance across the broadest range of conditions and terrain found in motocross and off-road riding

KimpexHD - Wheel Bearing & Seal Kit (25-1122-KIMP) Options:RR (25-1122-KIMP) In terms of engineering andKimpex high speed bearings are manufactured to ABEC 3 precision levels. Triple lip rubber seals keep the grease in and the water and dirt out. Chevron SRI 2 grease contains rust and oxidation inhibitors ( 29 C 177 C). Double lip type TC seals with stainless steel garter springs.