like i said the TT is a LITTLE heavier than the NA, not very much. and if you were to swap the NA engine for a TT they would be really close, but i have a feeling that would be relitively impossible unless you got tons of cash and time. and judging from the lack of comment my guess is is will never happen, $1500 is just a starting off point for that conversion. and i have driven a car without the hicas and there were no gains what-so-ever. the rear end did not inspire as much confidence while hard cornering. he only got the kit because repairs exceeded the cost of the eliminator.