20# per wheel more than the stock rotors? Seems impossible. I'd check that fact. I'd never put an extra 10# onto my unsprung weight per wheel. It will make it ride like a truck and hurt handling. I can feel a difference of 4# per wheel.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.