Mark Kus

Hi guys, I'm new to this for so I apologise if this has been asked before..

I have a 2005 wrx and I just got a new exhaust put on today, the front cat is still there but its straight from there back, the engine management light came on I presume this is because of the o2 sensor ? I also plan on putting a K&N intake on it in a few weeks and getting it remapped... whats the norm when doing these mods ? Can you map out the o2 sensor ? or is it better to put it back in(the straight pipe) and then get it mapped ?

This is my first scooby and I'm new to modding so any help would be greatly appreciated!!

bludgod

iTrader: (3)

yes the mapper will remove the codes for the rear o2 and also disable the rear o2 corrections (which otherwise would give you a bouncy AFR). K&N intake probably overkill when a K&N panel filter will do the job for you. Don't forget about the uppipe cat in a WRX 2.0 and also fuel pump and boost gauge.

If you don't know what to buy, follow the andy forrest guide - most folk on here would trust it:
http://andyforrestperformance.co.uk/58901.html