iv searched and cant find out clearly some of my questions, (1) is it true it can only be used on the S4 engine (the 1.7) and (2) what website sells them... also i heard u had to run 720 cc secondarys with them, i was wondering if greddy were a good set... thanks

 

1) true
2) pocketlogger.com

 

so what would be the best for a s5, safc II?

 

the best fuel computer? 'cause the rtek isn't a fuel computer. Personally, I would go with the safc (1, 2, whatever) for a fuel computer. So yes, I agree with you.

 

greddy e-manage