*These 4" diameter disc-based Megaphone Series are our signature muffler that utilize our patented Tunable Disc Technology and provide significant horsepower gains *Twelve - 4" discs, a Closed End Cap and all necessary mounting hardware is included with Slip-Ons and the 2:1. *Twenty-four - 4" discs, Closed End Caps and all necessary mounting hardware is included with the 2:2 *Megaphone Series are SAE-J2825 sound compliant. *The classic Megaphone design allows the exhaust gas to expand which increases power *Discs let you control the flow. Optional Open End Caps for closed course competition are also available.

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