Pro Circuit - 304 Factory Sound Silencer (Yamaha)

Pro Circuit – 304 Factory Sound Silencer (Yamaha)

The Pro Circuit 304 Factory Sound Silencer is built for riders who want clean top-end power with a smoother, quieter tone. Designed for Yamaha two-strokes, the 304 uses a slightly longer canister to boost over-rev and broaden the powerband while keeping noise levels in check. It’s a favorite for riders who want factory-level performance that looks sharp, sounds crisp, and lasts season after season.

Crafted with a 6061 T6 brushed aluminum body and stainless steel inlet tube and end cap, this silencer is built for strength, light weight, and that signature Pro Circuit style. The double-walled mounting bracket keeps it rock solid through hard rides, and the allen-head screws make repacking quick and easy. Each silencer is TIG and MIG welded by hand in the USA, guaranteeing quality, precision, and durability that stand up to real-world abuse.

Why We Like It:
It smooths out the power while keeping that lively two-stroke feel. You get a cleaner pull through the mid and top end, less bark off the pipe, and a high-end look that matches its performance. It’s the perfect “everywhere” silencer — track, trail, or race weekend.

Why It’ll Work for You:
The longer body design helps your Yamaha run smoother and quieter without losing power. You’ll get strong top-end performance, easier throttle control, and less fatigue from harsh sound levels. It’s simple to maintain, fits perfectly, and gives your bike that factory-fresh finish that lasts.

Variants / Options:
Fits most Yamaha two-stroke models. Works with stock or Pro Circuit pipes.

 

Key Features:

• Longer canister reduces sound and smooths power delivery
  
  

• 6061 T6 brushed aluminum silencer body for light weight and strength
  
  

• Stainless steel inlet tube and end cap for durability
  
  

• Double-walled mounting bracket for a secure fit
  
  

• Allen-head screws for quick, easy repacking
  
  

• TIG and MIG welded by hand in the USA