I'm thinking of buying a TBE since I hear that's the best hp gain for the buck. I was wondering if anyone can tell me if a TBE will cause a CEL? I have no mods done to the car at this time. I will eventually think about buys a Cobbs AP but that's in the future. I saw this TBE on Ebay, http://cgi.ebay.com/ebaymotors/02-06-subaru-WRX-STI-Catback-Downpipe-COMBO-TI-TIP_W0QQcmdZViewItemQQcategoryZ33630QQihZ016QQitem Z260002172001QQrdZ1 , which is only $350 shipped and comes with an up-pipe too. Now I know that it's not a name brand exhaust but it looks like it will get the job done and has a nice polished finish too. Let me know what you guys think of both ideas. Thanks!!

i started getting cel codes after i installed just my downpipe on my 05 sti. Got more after i installed my cat back greddy sp2. After i got the Cobb AP no more cel codes.

E

Well my car threw a CEL with just the downpipe. So then I got the Perrin CEL fix and it worked for about 5 months. Now every now and then I get a random CEL Code number P0139.

Good info, but that sucks to know I have to spend more money to get rid of the cels.

Good info, but that sucks to know I have to spend more money to get rid of the cels.

most vendors sell something you splice into the wiring of the rear o2 sensor to get rid of the cel you get form removing a CAT. Typically it is less than $20.

As for whether or not the TBE will throw a CEL, if you replace any fo the cats, you'll probably get a CEL, but it isnt anything big, just telling you that the cat which is now on your garage floor, isnt working right

LOL. I'll keep that in mind when I'm going to buy a TBE. Thanks MBasile

most vendors sell something you splice into the wiring of the rear o2 sensor to get rid of the cel you get form removing a CAT. Typically it is less than $20.

As for whether or not the TBE will throw a CEL, if you replace any fo the cats, you'll probably get a CEL, but it isnt anything big, just telling you that the cat which is now on your garage floor, isnt working right

It will still throw cel codes. I had this cel fix on my downpipe. Just wont throw them as often. Or usually it would only happen when i was in 5th or 6th WOT. I dont think its bad, the ECU just doesnt like what it sees.

E

It will still throw cel codes. I had this cel fix on my downpipe. Just wont throw them as often. Or usually it would only happen when i was in 5th or 6th WOT. I dont think its bad, the ECU just doesnt like what it sees.

E

you might want to double check your cel fix wiring....mine has been in for a long time with 2 rally-x's and a track day in addition to normal spirited driving and hasnt thrown any CELs again. But yes, its not a problem, its just that the ECU sees that more pollutants are coming through the exhaust than should, so its telling you the cat is bad

High flow cat. No CEL.

well it wont throw a CEL if you replace the up-pipe and get rid of that cat. But yes it will throw a CEL if you replace the down pipe. The perrin CEL fix works but like what was previously said before it wont throw a CEL as often.

you might want to double check your cel fix wiring....mine has been in for a long time with 2 rally-x's and a track day in addition to normal spirited driving and hasnt thrown any CELs again. But yes, its not a problem, its just that the ECU sees that more pollutants are coming through the exhaust than should, so its telling you the cat is bad

I have the cel fix that is a spacer and comes with the helix catless DP. Dont have the wired in fix. But since i got my AP i have not gotten any cel's due to the exhaust.

E

Just buy 2 spark plug defoulers from Kragen for a couple bucks, screw em together and install with your o2 sensor. I did this back in March, still no cel's with 3'' tbe w/ high flow cat and catless uppipe.

just get ur ecu reflashed that will get rid of it and give you a little more power.