HOME and how to join Forum Open Area General Scott topics Blind head exhaust mounting threads ? Re: Re: Blind head exhaust mounting threads ?


As Dave says, they were 5/16″ X 26tpi Cycle thread in blind-head blocks, and bolts are freely available from various specialist suppliers. Do thoroughly clean out the blind holes as an amazing amount of swarf and crud always seem to be in the holes, and it can prevent the bolts from tightening down properly onto the exhaust pipe flange.