I have a spare transmission sitting at my shop and I would like to rebuild it but I want to "beef" it up, just curious is the kit from supercoupeperformance rated for over 400 horsepower? Or should I go else where?
The best internal parts for a 4r70w are the OEM ones... don't waste money on stupid hop up crap...
I'd say this is a bit of an over-generalization...