I have an 02 6 speed. I have heard Y-pipes don't do much for 5.5gens. Is this really true? I have seen the dyno's for the HS headers and know they are good. There is quite a price difference in these two, but I was originally thinking of getting the y pipe first then the headers a year or so down the line. Now I'm thinking to just go all out right now. Any help/advice would be much appreciated. Thanks. Chris.

 

http://forums.maxima.org/showthread.php?t=302743

 

I am debating the y-pipe or headers question myself. I had heard the y-pipe was wonderful for the 00-01 but not so great for the 02-03. I have seen no reliable numbers though.

 

Get the Cattman y pipe and HS headers!

 

ROFL you would be wasting whatever you spent on the y-pipe if you got them both.

 

HOT SHOT HEADERS ALL THE WAY , the y pipe doesnt really do anythign for the 02-03 max trust me youll love the hs headers

 

HS headers comes with headers and y-pipe

what would he do with 2 y-pipes?
-J

 

just buy the headers....ok

 

Not so fast Qmax:



NOTE: Note that in the
Y-pipe run the torque convertor would not lock up when the wanted and that
is the reason for the low sub-4000 rpm figures on that run. You can
confirm this by looking at the y-pipe + b-pipe run, which did not have the
problem with TC lockup.

Courtesy of Brian Catts.

 

Here's with the both the Cattman Y and B pipes:



That said, I've already made my purchase for the Y-pipe.

 

Cattman y-pipe $350 - free install
Hotshot headers - $550 + $300 install.

If you have the cash go for the headers, but the y-pipe won't disappoint you.

 

wildmanal said it best. if you have the cash (and don't have to pass a visual emissions inspection) go all out and get the headers...but the Cattman Y is effective.

 

This might help.

http://forums.maxima.org/showthread.php?t=291520

 

free install. I feel so dumb hearing you all talking about the y-pipe. I don't know what it is. I straight out said it. I thought there was just intake, header, and exhaust. Please elobrate someone

 

The Y-pipe bolts of to each of the two exhaust manifolds, bringing them together into one pipe which then bolts to the catalytic converter. The stock Y is very restrictive.

Headers replace both exhaust manifolds and the Y is incorporated into the design. If you have headers, you will have no use for a Ypipe since headers take your exhaust all the way to the catalytic converter.

 

The y-pipe is a section of hte exhaust that attaches to the exhaust manifolds and extends to the catalytic converter. There are two other sections commonly mentioned; the catback and the axle back (or rear section). The catback is exactly what it means the exhaust section from the catalytic converter to the muffler. The axleback or rear section goes from where the b-pipe ends at the axle to the end of the muffler. The b-pipe extends from the catalytic converter to the axel.

 

hey ripper did you do the install yourself??
-J

 

i installed the headers myself...not the easiest job in the world!!!!!!!!!!!!!!!!!!!!

 

but if i have the right tools and some help ......i should be ok right??

i just cant bring myself to spen like $300 to get somethign installed
-J

 

Can someone tell me what happens to the O2 sensors when you replace the stock y pipe? And since the pre-cat is removed, wouldn't it effect the readings of the sensors and throw a SES code?

 

Me either. so I can install the y pipe myself. Would I need a lift to do it? Also please would this void my warranty or make my car louder. I am using it as a company car to take clients out in, and would like it quiet unless I went wot. I live in pa is it leagal to havfe this?

 

Technically the y-pipe is not legal because it removes pre-cats and hence would fail emissions tests....of course you can get around that, but you only asked if it was legal.

 

2k2whitemaxi - I have a 2-ton jack and put the car on jackstands so I could do the install myself. But I started to round off the bolts on the B side of the cat so I had a shop do it for me. I think I would have been fine if I had some 6-sided wrenches...oh well, live and learn.

Also, the Cattman Y for the 02-03 does not remove any pre-cats and therefore should have impact on emissions testing. The pre-cats on the 02-03s are close coupled up to the block. The 00-01 Cattman Y is not emissions legal (in Viriginia anyways) as it does remove the precats.