whay i am asking is what is the difference between 13b first gen rotors and 13b tll rotors i have a chance to get some but if they will not work for my tll i dont want to wast the money

 

!st gen rotors are high compression, TII are low.

 

the first gen isnt a 13b. its a 12 a. which means its a 1.2 liter and not a 1.3 liter. thats the difference.

 

Nope wrongo, some 1st gens came with a 13b (GSL-SE) that is almost identical to the S4 Na.

 

ture, but 12as' are not 1.2litre they are 1.1litre, there are also a huge weight diffrence, and going with 1st gen rotors is an utterless stupid idea, but i am sure you didnt know so we wil let you be :P get some tII rotors or if any thing else get 86-88 NA, but bewarned about running high boost on those high compression rotors, search around and you will find out why.

 

Again I say 13b from a GSL-SE is almost idetical to a 13b in a S4 NA. He could use them, but would have to compensate for the higher compression.

 

ok so that means dont buy them cause they are useless for me thanks guys