Exhaust back pressure drill and tap kit

This kit contains an 1/8″ pipe tap and a pair of drill bits to facilitate the installation of an 1/8″ pipe-threaded hole in an exhaust manifold flange into which a back pressure measuring kit can be installed. When using the tapered pipe tap, dry fit the 1/8″ pipe plug frequently (included in kit) and stop enlarging the hole when approximately 1/4 of the threads on the plug are still showing outside of the hole.
(EXHT_04.1_491)