Finally, thanks to Summit Racing for supplying a large pile of 38- and 12-inch Allen pipe plugs to seal up many of these manifolds. ... 12-inch pipe plugs (4) G1483. Summit Racing.

Various 3/8-16 nuts have been used over the years toconnect the head pipe to the exhaust manifold. We prefer to use Stoverlocknuts, as this style is crimped at the top, allowing good retentionwith ...

Building engine performance in the face of limited intake manifold function. ... Rocker-arm ratio and primary header pipe are two possible “tuning ... Spark plugs This dealt with heat ...