Xise
12-13-2009, 12:08 AM
Ok so here is the deal, I am up for inspection this month, just got my cracked windsheild taken care of today, next is tires then finally I need a new cat.
Soooo.....as opposed to speding upwaqrds of $300 on a high flow cat I think i am going to make my own pipe and weld some flanges on. Since the stock ct of the RS up until 05 have an abrupt bend right at the start of the cat section what I was planning on doing was grabbnig some cheap ass ebay headers for a wrx and running a more striaght section of pipe from the wrx header to the midpipe and have a cat be somewhere near the front of that pipe so I can use my stock o2 sensor and not need to extend it.
my question is, does the 02 sensor need to be before or after tha converter? I really need to get an emissions sticker otherwise I would just say screw theconverter and run a straight pipe....I am going to have a stromung catback soon so I think the cat section would help eliminate some of the rasp and act almost as a resonator...any thoughts on the matter...fittiment issues?
oh yeah BTW this was the cat i was looking to get http://cgi.ebay.com/ebaymotors/MagnaFlow-HI-Flow-Converter-2-25-Round-Single-O2-53035_W0QQcmdZViewItemQQhashZitem563795052aQQitemZ 370299700522QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAc cessories
along with these headers http://cgi.ebay.com/ebaymotors/02-03-04-05-06-Subaru-WRX-STI-header-manifold-4-2-1-New_W0QQcmdZViewItemQQhashZitem3a55be7554QQitemZ25 0546648404QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAcce ssories
LMK what you think...I think it will be fairly easy to get this fitted tack welded and then finished up ceramic coated and installed. I know people have done something similar to this so feel free to chime in and let em know whats up
Soooo.....as opposed to speding upwaqrds of $300 on a high flow cat I think i am going to make my own pipe and weld some flanges on. Since the stock ct of the RS up until 05 have an abrupt bend right at the start of the cat section what I was planning on doing was grabbnig some cheap ass ebay headers for a wrx and running a more striaght section of pipe from the wrx header to the midpipe and have a cat be somewhere near the front of that pipe so I can use my stock o2 sensor and not need to extend it.
my question is, does the 02 sensor need to be before or after tha converter? I really need to get an emissions sticker otherwise I would just say screw theconverter and run a straight pipe....I am going to have a stromung catback soon so I think the cat section would help eliminate some of the rasp and act almost as a resonator...any thoughts on the matter...fittiment issues?
oh yeah BTW this was the cat i was looking to get http://cgi.ebay.com/ebaymotors/MagnaFlow-HI-Flow-Converter-2-25-Round-Single-O2-53035_W0QQcmdZViewItemQQhashZitem563795052aQQitemZ 370299700522QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAc cessories
along with these headers http://cgi.ebay.com/ebaymotors/02-03-04-05-06-Subaru-WRX-STI-header-manifold-4-2-1-New_W0QQcmdZViewItemQQhashZitem3a55be7554QQitemZ25 0546648404QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAcce ssories
LMK what you think...I think it will be fairly easy to get this fitted tack welded and then finished up ceramic coated and installed. I know people have done something similar to this so feel free to chime in and let em know whats up