engine gm 18 includes gm pfi ford tbi geo tbi ford tr bosch pfi gm tbi gm scpi hid compression tester kit gm scp noid light set features • tests electronic fuel injection systems quickly & easily • comes complete with instructions and case gm pfi gm pfi bosch pri • spread limit permits easy insertion into cylinder • use with a variable speed drill · coarse and fine replacement stones are available includes compression gauge with quick release coupler engine cylinder hone features • smooth honing at all speeds kincrome adjustable ignition spark tester features • suits lawn mowers to high energy ignition systems • tests for no start conditions • tests for spark strength • screw assembly for quick spark gap adjustment engine cylinder stones features coarse fine grit grade grit grade kincrome automotive