+1.. You are correct !

 

Kline catless ftw, I run the j shaped o2 foulers and no CEL

 

Jason can you tell me which fouler you are using? I got a Kline also but a P0430 fault since installed ;-( I got some extensions but too long to put the 02 sensors...I guess you got the 90 degrees ? If possible where did you get them...Thanks for the information....

 

I am running the smallest restrictors.

Stock tune, Cobb upload soon

Cheers

 

O2 extenders did not work for me and I tried nearly every configuration

 

With a Kline or another type? Did you had the P0430 fault? That's what I got on the right bank only....

 

I had P1155 and yes, right side.
Speedtech 3" xpipe exhaust

 

Those Vibrant 11619 spacers are great.

 

Order some yesterday! I hope it will fix this fault I am living with since 2014 ;-) The other solution of replacing both cats (as per Felix) with new improve one is a bit too expensive for me

 

If you want "cheap", why not find a "good ole boy" and have him install some pipe and some bullet mufflers. Keep the OEM when you grow tired of drone or can afford a nice set up. That way you aren't doing irreversible mods.

 

Keep me posted mate. I will do what I can to help as you have been so helpful to others. I have a feeling the spacers will do the trick!

 

Thanks !!!

 

Stock mufflers are basically worth less so for starters drill out the stock muffler and see how that goes for you. If thats not enough then pick up an aftermarket stock exhaust. Drilling out the stocker adds volume and zero drone and is free so give that a go.

Lots of discussion on it in this thread here, believe it was 15hp increase or so:

https://www.6speedonline.com/forums/...ler-996tt.html

Pull stock tip, ram a 2" hole saw up the exhaust outlet until you drill a hole through, pretty simple. Don't even need to remove the muffler. I did it a few years ago and it it's been enough for me for years now. I take my kids in the car with me so a loud drony exhaust isn't an option.