Yes, the ZUH 19 is a bolt in deal, and is really needed in your tank, as you have the original Type 1 TU's which are way too fast. Good thing about the ZUH19 is if and when you go to the later Tam trans, the Type 3, it is a simple deal to unbolt from the Type 1's and bold to the Type 3's. I've used the ZUH19 system for 7 years now on just about all my Tamiyas. Never had the first failure.