4" Base (Quiet Insert)
Stainless Quiet Insert Description:
The Pro Circuit Stainless Quiet Insert is available in multiple sizes to make your motorcycle quieter, without the loss of power. These inserts are available for both the 4" canister and 3.5" canister. Call for applications.
Note: 2007/2008 Stainless Quiet Inserts will NOT fit older model end-caps.