Yoshimura Low Volume Insert Kit R-34 Muffler (INS-29-K)Yoshimura Low Volume Insert Kit R 34 Muffler (INS 29 K) Sound Insert for R 34 Mufflers. This new insert is designed to take the dB level down and fit perfectly with R 34 applications. This product was designed to fit on a standard equipped motorcycle, as delivered from the factory. OE and aftermarket accessories not found on a bike as delivered from the factory may not be compatible with this product. Attention international customers: This product