Whipple and Kenne-Bell oth use a twin screw supercharger. Whipple has been oing the GM vehicless from the egining an Kenne-bell started wih the Ford. Kenne-Bell has just started getting into the GM market with the kits. They also replace the injector like the Magnacharger. Whipple works great on the H2 ut you will nee the programmer to help with the torque management. I on't think the others have worked that out yet.
I had a customer run an Intercooled Magnacharger and a Whipple on the dyno and the Whipple made 36 more HP with less boost. But all 3 companys make good products.
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