Originally Posted by Graceland
Doug -
do you have a refernce book for the twincam tho?
NO
But as a guess I would say that whatever the twin cam 5th gearbox ratio is, it wont be vastly different from the Saph.........
I.E. changing from the standard Saph Cossie 15" wheels to (for example) 17" would be a much bigger difference.