I have several customers with the 2.9 Whipples. The only issues they have is slinging belts with the smaller pullies (and the tensioners sometimes break) and they are all switching to our 10 rib kit from the 6 rib, finishing up the whipple brackets now. They had no issues when running the 4" pullies. Otherwise, great blowers. Make a bunch of power. I may end up with a Whipple on my car after this TVS2300 runs out of breath.
Twin disc clutch should include everything you need, depending on brand. My Street Slayer required a very, very minor mod to the slave cylinder to allow for the aluminum bearing support and larger throwout bearing.
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