| We had a NA subframe in a 5 sp car as early as 2000 and the car was fun on the street but we never really gained too much in mph on the track. Eventually we broke that diff (big surprise) and switched back to the TT rear due to strength. I totally agree with you that a NA rear is not a great idea on a 5 sp but i think its a good idea on an auto IF it holds the power. I'll be using the NA rear with sport 530s on my car so we will see if it handles the power with slicks - i guess only time will tell. In a auto the NA drops 1st gear down 10 % to stock TT 5 sp gearing. I'm thinking that will help the launch a bit + allow me to spool faster/ get in the powerband sooner. It would be truly awesome if i could get out of the hole around 3000 to 3500 rpm WITH BOOST heheh Harry
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