Is the air pump really needed for anything important on a stock 90 N/A GTU? I'm asking cause the mounting bracket is broke clean through and for the most part all I see it goin to is the exhaust

 

if you still have catalitic converters they will clog without it. you als o have an s5 so your auxilary ports are actuated by the pump so you will have to find another way to actuate them.

 

hmmm well then guess I'll just have to hope someone has the bracket I need around here before my baby decides to throw it around the engine bay. thanks for the info

 

yeah, keep it. On an s5 it is much more necessary.

 

s4 aux port
S5 aux ports

 

Also needed for the VDI...

 

Or you can say **** the aux ports as I have and wire the VDI wide open. You'll lose about a quarter of your lowend torque and drivabillity but the top end will rock all thee same.

Oh yeah...cats thing is true. Without it you'll **** the cats...the coverter kind and any that happen to be sleeping near by...that's smelly.