It has hardened pins and a 3/8 square drive You have to remove the 10mm shaft then you have to hold the center with the provided socket then loosen the ring locking nut with either a 1-1/16th or 27mm wrench or a adjustable wrench with that range

55X-81800-51

S600 Maybach

13201-29177

high precision

Pair Exhaust Manifold Headers fit Chevy Camaro SS 6.2L V8 2010-2015 CBR250RR It has hardened pins andFeature: 1. Getting more air into your engine and more exhaust out is the key to a performance motor. That's where exhaust headers is significant as the first revenue of an exhaust system. Exhaust performance headers manipulate the air flow with the performance robbing exhaust manifold that came with your car. 2. Headers provide each cylinder with its own mini exhaust pipe, which means exhaust headers prevent interference among cylinders; thus, the