The Pro Circuit 304 Silencer is a durable slip-on muffler designed to reduce noise while helping add top-end performance thanks to its slightly longer body. Built from premium materials for long service life and easy repacking.
The Pro Circuit 304 Silencer (Slip-On) is a proven off-road muffler upgrade built for riders who want a strong, long-lasting silencer that keeps sound levels under control without sacrificing performance. Its slightly longer canister design is engineered to help reduce noise output while offering added top-end performance, making it a smart choice for track days, trail riding, and race use.
Designed for durability and easy maintenance, the 304 features a 6061-T6 brushed aluminum body paired with a stainless steel inlet tube and end-cap. Strong TIG/MIG welds and double-walled mounting brackets support reliability in harsh riding conditions, while the Allen head screws make repacking straightforward—helping extend the silencer’s lifespan and keep performance consistent over time.
