*Universal Aluminum Racing Series Slip-Ons are the ultimate 4" external disc-based exhaust performance upgrade for your bike, quad or any number of unique applications *The Brushed Aluminum canister, steel core and high tech packing deliver a sweet ride every time *They utilize our patented Tunable Disc Technology. *Utilizing the tunable discs coupled with a Closed End Cap serve as an Integrated U.S. Forest Service approved spark arrestor for endless hours of safe riding. A completely rebuildable core and packing to simplify your maintenance while saving you time and money. *Select models include eight or twelve, 4" discs. *Add 4" race discs to increase horsepower, exhaust tone and flow. *Subtract 4" race discs to reduce sound and increase low-end torque.

OVERSIZED ITEM: Oversized items do not qualify for free return shipping - Return Policy

PROP 65 WARNING: Cancer and/or reproductive harm - www.P65Warnings.ca.gov