I was told from a 5th generation Maxima owner to cut my cat but only if the 02 sensors are before it. Has anyone done this to the 6th gen. max and what are the pros and cons of doing this?


2004 3.5 SE
Injen intake
12 in Cerwin Vega Stroker
Mtx 6500D amp
7% tint rear 3, 23% driver and passenger

 

Gut the cat you mean.

Pro: 'Some' performance boost
Con: Forget about passing smog, and high temps will occur

Just get a aftermarket hi-flo cat.
Stay away from Random Tech. It's paper crap. Ever see a paper cat collapse? I have, with the 350. Not a joy filled event, especially at the price they charge.

If you really want to get rid of them, buy test pipes.

here are some crawfords for the Z i recommend. Not sure if they'll fit but if you contact Mr. Crawford I'm sure he'll modify it for the max.
http://www.performancenissanparts.co...oducts_id=1532

Stillen has some test pipes for the Z/g35. Wonder if they'll fit the Max.

SPeaking of crawford...I wonder if the plenum will fit Max... that would be nice... Too bad my 350z is gone.

 

Here is a y-pipe.

http://www.customenterprise.com/view.../vts/design004

I just recieved one yesterday and will be installing it this weekend.

 

I have't taken a look under the max but the y-pipe is after the cats right?

 

On the stock system, the cat is part of the "y" pipe. The aftermarket "y" pipe eliminates the cat and goes straight through to bolt to the rear section, in front of the resonator. There are also two pre-cats in front of the "y" pipe. I am sure that putting in a "y" pipe that eliminates the cat is totally illegal for street use in all 51 states.
When my car needs to be tested for emissions (Next year), I am going to see if it will pass without the cat. I am betting it will.

 

no, the main cat bolts up the flange on the straight long end of the y pipe.

 

Do you guys know If the Y-Pipe will have horsepower gained or just sound changed ???
If its worth it, I'll get myself one too. Anybody has Y-Pipe on your Maxima, tell me how you like it ???

 

Cats -> y pipe -> midsection resonator -> rear section

Correct?

 

Like redop max said, the cat is integrated into the y pipe. Best thing would be to wait for headers if your looking for power.

 

Stock system= pre-cats-> y pipe w/main cat-> midsection w/resonator-> rear section w/ two mufflers.

 

alright, gotcha

thanks!

 

excuse my ignorance on the subject but i pretty much got everything everyone said so far and i think i might order that y pipe but getting the headers would replace the y pipe? so it would be a waste to get it if i were planning on getting the headers when they became available

 

That is correct.

 

Cause the headers are equal length?

 

I was told by Custom Enterprises that their headers may or may not include the y-pipe.

 

Cool, thanks for all the info. i just went to www.howstuffworks.com and read all about that cats and mufflers...etc Now i see what you meant, jason, about gutting out the cats, i always heard cutting but gutting makes a lot more sense. As far as the emissions test, michigan doesn't require them so i'm not worried about passing anything.

 

Well considering they sell a y pipe as a seperate piece already, then that is probably true. I guess they are thinking ahead, people can buy the y pipe and complete the headers with the other 2 pieces.