If it was me i would get jim berry to build me a clutch... you might pay the extra coin but it will last alot longer and he will build it to suit your requirements etc, on another note i have had first hand experience with mms button clutch and heavy duty clutch, the heavy duty clutch wont last you mate the excedy sports tough is also much more drivable on another note the mms button clutch takes a beating and performs well!! my 2c anyway