eh...aluminum flywheel ok...do you think hes gonna keep that 5 speed too much longer? I would assume at some point he'll go to either an auto or 6 speed whether thats a t56 or a properly geared richmond to take advantage of the powerband better which he'd need a new ds for because i belive the 5 speed is a few inches shorter...just a thought...and like I said going from 12lbs to 8-9 or whatever a CF DS weighs isnt that much even with it being rotating mass...i didnt gain anything on the dyno going from my steely to the aluminum one fwiw