im lookin into getting the 3" down pipe
and from what ive been reading on here i need a spark plug refoiler? to prevent check engine light.
if so where do i get this?
and watsa good price on a down pipe for a 99.5 A4 1.8TQ ?

ive been looking on www.ecodetuning.com

another question:
im lookin into getting a GIAC chip and it says i need to get a better diverter valve. which one should i get??


thanks!!!

 

Sounds like an O2 simulator of some sort. On the DV there area few different brands but they pretty much all do the same thing.

Evolution Motorsports
Neuspeed
Hyperboost are pretty nice

The reason for it saying that you need a DV is because the chip raises your boost level which the stock DV doesnt really hold the additional pressure. Seals and rubber gromets just dont hold on them and wont hold the new boost!

Goodluck,

Adam

 

you need two sparkplug NON foulers, drill one out so the o2 tip fits through it then screw the second on the end of that. Then screw the whole assembly in to the second o2 sensor hole

 

where do i get the non foilers?

thanks for the help!

 

On the dv, id say Forge or Hyperboost. I had an extra VFengineering dv laying around and for some reason my boost spiked all the time. Just Food for thought. Oh and you might want to avoid installing that dp yourself. Tight places down there.

 

I got my Non Foulers at Auto Zone but any parts store should carry them.

 

and do the non foilers screw into the down pipe?