Im getting ready to order a new McLeod Street twin as soon as I figure out what the differance between these 2 part numbers are. Here is the first MCL-64022-1A-07 "Flywheel is 153 tooth, includes steel replacement master cylinder" and here is the second MCL-64022-00-07 "Special internal balancing, flywheel is 153 tooth and includes steel replacement master cylinder". Whats the differance with the balancing? Which would be better for a street driven car that sees the track 8-10 times a year but gets alot of street action? There is only $24 differance in the price so thats no big deal, but what is the differance in the clutch? Please let me know if you know. Thank you very much.

Jeremy

 

The choice between these two clutch kits has already been made for you. The 00-07 clutch has a zero-balanced flywheel, and is therefore meant to be paired with an engine that has been internally balanced when it was made. Most professionally built engines are internally balanced.

The 1A-07 clutch, on the other hand, has a flywheel meant as a direct replacement for the factory unit, and is balanced accordingly. The stock LT1 is not internally balanced - there is some weight built into the flywheel to externally balance the motor.

So... if your car is running the stock crank/rods/pistons, you will need the 1A-07. If you have a motor built with internal balancing, you need the 00-07. However, if needed, a machine shop could balance either one properly for your application. What clutch is currently in the car, and what sort of motor?

 

Wow, Thanks for the thurough reply. Im running the SPEC stage 4 and I have a stone stock LT1 with a CC306 and bolt ons. Ive got some good use out of the SPEC4 for about 50,000 miles but Im ready for a real clutch that I know Im not going to have any issues with.

 

Yeah, you'll need the 1A-07. And you won't regret the choice of the Street Twin. It will seem harsh at first, but after broken in for about 500 miles they work great!

 

Awsome! I cant wait. Im sure my 10 bolt will hate it, but Illl have my 4.10s in next weekend so I wont have to deal with 3.23s anymore. So hopefully it will last a few passes. Thanks again for the help.