Pro Circuit - 2-stroke R304 Shorty Silencer - Yamaha

Pro Circuit – R-304 Shorty Silencer

The Pro Circuit R-304 Shorty Silencer is built for riders who live wide open. Designed for closed-course racing, this compact silencer gives your two-stroke instant throttle response, stronger midrange punch, and that razor-sharp “factory” sound that makes every twist of the grip feel electric. When every second counts, this is the setup you want bolted to your bike.

Built from a 6061 T6 brushed aluminum body with a 304 stainless steel intake tube and end cap, the R-304 is lightweight but tough enough to handle serious moto abuse. The E-Glass internal packing lasts longer and keeps performance consistent, while the allen-head screws make repacking quick and easy. Each silencer is TIG and MIG welded by hand in the USA for maximum strength and reliability. With its short-can design and double-walled mounting bracket, the R-304 is pure race tech — all business, no fluff.

Why We Like It:
It gives your bike that crisp, explosive snap off the throttle that makes racing fun. The sound is clean and sharp, the power hits instantly, and the build quality feels straight out of a race shop.

Why It’ll Work for You:
This silencer helps your bike rev faster and pull harder through the midrange, giving you more control when you need to accelerate out of corners or over jumps. It’s lightweight, durable, and easy to maintain, so you get more performance and less downtime between motos.

Variants / Options:
Available for a wide range of two-stroke models. Designed for closed-course and race use only.

Key Features:

• 304 stainless steel intake tube and end cap for durability
  
  

• 6061 T6 brushed aluminum silencer body for low weight
  
  

• Double-walled mounting bracket for secure fit
  
  

• E-Glass internal packing for longer packing life
  
  

• Allen-head screws for quick, easy repacking
  
  

• TIG and MIG welded for race-grade strength
  
  

• Made in the USA