so i was just browsing around audidiy.com and found a diy for the n75 valve. inside it included part number... but it was not H and Race like ive heard, it was C and F?

heres a link http://www.audiworld.com/tech/eng70.shtml

anyone know which is which? which is the most aggressive one?

 

J is the most aggressive one.

ECS Race and H Valve are the same thing too.

 

yea i knew that... but what are these? C and F? ive never heard of those....

 

http://www.tyrolsport.com/vwperformance.htm

scroll down to n75s

 

most recomend going with the race valve, the j valve can send you into limp mode, there is a great article on az

here it is
http://www.audizine.com/forum/showth...;highlight=n75

 

its widely debated but from that one guy on AZ it looks like on the 2000 ATW with GIAC the RACE valve is the way to go