Trans Cooler
Which would best suite my need for a street strip car? A4 soon to be stalled



Catch Can

PCV any site cheaper then WS6 store for 100$



25% Underdrive pulley
anywhere cheaper then 200$ do I need a altenator pulley as well?


SLP Fan switches
Any site have them cheaper then 65$?


Are all these things a good idea for me to invest in? Anything else I should think about?

 

??"???

 

thanks for the help