its OK...but like i said the 3.5 is a good option even for TT guys. If you change the pistons to 8:1 compression you now have a 3.5 TT engine...LOTS more power and TQ throughout the entire powerband...and more HP per PSI. Its a great option for any aspect of performance. I dont expect everyone to throw away their engine, but there have been people who have run the 3.5 with GREAT results. No one has just yet gone to the next level and tried to set any records with it. And the weight difference isnt that much to concern yourself with that in any way shape or form.