So i wondering anyone on here running gutted stock pre cats?

If so, are u throwing codes?

 

I have been running gutted exhauset manifold cats along with racingline ypipe for about 2 years. As long as you trick the ecu by setting the secondary o2 sensors out from the exhaust stream then you will not have a CEL. I entertained the idea of headers and racingline asked me to be part of their design project(test car) for their precats but I got anxious and decided to gut the cats and skip the wait for precats and cost of headers. There is quite a performance noticeable performance boost by doing this but the car also smells like gas when you walk behind it. Our cars run rich from the factory and I dont have a tune. I have been planning to get a tune I just havent gotten to it. Let me know if you have any other questions?

 

Just get ebay headers and be done with it.

 

It's not as easy as just gettin ebay headers and slapping them on and calling it a day or thats what I would've done. There is much modification that must be done to those headers to get them to fit properly, plus they are not long tube headers anyway and they sound like sh#t. Not worth it in my opinion.

 

I ran gutted pre cats on my 5th, and didnt get any codes, and nice little performance for a DIY....but car got totaled and got headers now for the one in Sig...Good Luck.....

 

Im only gutting them for my turbo appilacation becuz the cats would get blown out due to all the forced air flow, but i wanted to drive around with them gutted now so

 

You will notice a performance increase by gutting them. How big of a turbo are you putting on?

 

Either a hx35 or 60trim

 

Do they even still make headers for 04+ models? I've had no luck finding them...

 

Whatever fits the Altima should nearly be a direct fit for the A34 chassis. I'd keep my eyes open for a set of 02-06 Altima headers.

 

So they may need some motification? I just recently bought an 04 and haven't had any past experience with them. I know when I bought an eBay header for my old civic it just needed some modification for the exhuast donut to fit properly. I didn't know if it needed motification how intense it would be.

 

might aswell just take those pre cats off and replace with just 2 nice curved pipes at a muffler shop or something....

the stock precats are a horrible and not to mention heavy as hell

 

you mean from the stock headers?

where would i put the o2 sensors and dore the o2 similators thne?