H.S.I. big bore head pipe gasket for Yamaha factory b-pipes and all solid top 3 bolt head pipes.
51mm diameter (standard is 46mm). Heavy Duty metal gasket.
We were tired of how expensive these HD head pipe gaskets had become from other vendors, so we decided to have our own made to set retail at a much more reasonable price.
*PLEASE NOTE - We do NOT recommend this big bore head pipe gasket for most Kawasaki applications as it will expose the water jackets.
Part Number: HSI-88-U-HP51
