70MM is great with a n/a car, I was told not to go bigger than that. Both units were on his car just over a month and it was a garage queen that was rarely driven. He noticed a difference with them both on his car.
Even looking inside the plenum to can tell that it is clean. I tried snaping a pick but it would not focus right.
The adjustment screw on the TB needs to be adjusted for the proper RPM. He had it set for a Procharger and it needs to be backed down. He tossed a rod with the Procharger - sold the blower and installed a new bottom end with the KB. so now with him having a Kenny Bell - he has no need for it.