Roger Clark Motorsport 2.1 Budget Street Forged Stroker Kit 92.25mmPower, Torque, Strength and reliability. These are all benefits brought to you with the RCM 2. 1 stroker kit. When thinking of purchasing any engine components (in particular a complete stroker kit) it becomes vital that you make your choices wisely. Building a new engine, or rebuilding your existing engine is something you should only need to do once, therefore its important that you use components which are fit for purpose and will provide you with