WRX with 3" Turboback M2 Performance Exhaust

2004 WRX. It has a 3" M2 Performance catback exhaust mated to a project godspeed catless downpipe. It also has a Go Fast Bits blow off valve, drop in K&N air filter with the intake silencer delete, and strut connector bars. Let me know what you think!

Category:

Autos & Vehicles

Tags:

• 2004
• WRX
• M2
• Performance
• turbo
• back
• catback
• GFB
• Go
• fast
• bits
• bov
• catless
• project
• godspeed
• subaru
• boxer
• rumble
• unequal
• length
• headers
• sound
• race
• racing
• sti
• subi
• scooby
• scoob

[txsc2216]

and did u get an antifouler for the o2 bung? do you like the setup

[teamcrackitracing]

@txsc2216 I did get an antifouler for the 02 bung. I did like the setup I had on this, but it sounds 10x better with much more tone after i installed the uppipe. Videos soon to come!

[bigpunn421]

sounds great. and its 3". did it come with a o2 bung? or did you have to weld it in?

[teamcrackitracing]

@bigpunn421 Yeah the downpipe came with the o2 bung. Most of them don't because when you tune the ecu you can just delete the reading from the rear sensor.

[t1bud42]

I wish my m2 came with that muffler! 

[txsc2216]

did you have any trouble with fitment on the godspeed downpipe?

[teamcrackitracing]

@bigpunn421 I just went catless uppipe last week though, and didn't do either and I haven't had a CEL problem. Once you get a stage 2 tune, the ecu doesn't even read from the rear o2 sensor anymore, so you don't need the antifouler if you're going to do it all at once.

[teamcrackitracing]

@bigpunn421 Well, a 9-2x is the same thing as a wrx but with saab badging. If you're going to bypass the downpipe cat, do the antifouler thing i mentioned. When bypassing the uppipe cat, just take out the cat- there is no o2 sensor in the uppipe. There is an EGT sensor. Guys say you can do one o two things- either break off the egt sensor tip, and eave the probe in, or put a resistor in where the upper egt sensor connects to the harness.

[bigpunn421]

@teamcrackitracing nice tip. i always thought the ecu needed to read the sensor.

and do you have ifo on bypassig the uppipe cat and dp cat on a 05 saabaru 92x? i hear you have to add a resistor? but idk what for or why

[teamcrackitracing]

@bigpunn421 Yeah it comes with the o2 bung. But you have to buy spark plug antifoulers (either 1, or 2 to be safe... mine has 2), thread them into the bung, and then thread the o2 sensor into that. It pulls the o2 out of the mainstream of the exhaust, so it wont trip the CEL