6spBlkMax

First of all I want my car to remain quiet and dont really want a cat back. So my question is this.... Is getting a Y pipe still a worthwhile investment for some more hp even with the rest of the exhaust stock??? Has anyone else done this? IF so, does the car remain pretty quiet and are the gains in power noticeable? thanks

HotshotVQ35

iTrader: (5)

it makes power, not a whole lot, i did 218whp/228tq in my 02 6spd with a cattman y and WAI. i think if you add the b-pipe you will get a quieter g35/z exhasut note. dont bother with the rear section, its only good for making noise..

SoonerFan

iTrader: (5)

a y-pipe alone will have minimal gains on a 3.5 since it doesnt remove the precats like on the 3.0. to lose the precats and gain the power you need headers.

crispykid717

iTrader: (7)

If you get a y pipe your car will not be quiet. I noticed a significant sound increase after I got my y pipe. Is a y pipe worth the money for the gains you will get? I would say no.

frankd121

iTrader: (1)

gains with y-pipe on the 3.5's are not worth it imho. i would rather invest in a set of headers since the power gains are quite significant for it.

MAXRB8

iTrader: (19)

A couple of quotes from my PM from Brian Cattman of Cattman performance: "There you go, the catback and intake probably give you an extra 14-16hp at the wheel, and that does make a big difference. My 02 typically dynos in the 240-242whp range, which should be around 300 crank hp. Its surprisingly easy to get an extra 30hp from this motor given that its running so efficiently already."


"I'll point out that, inverse to their 95-01 VQ30DE counterparts, the VQ35DE Maximas actually make more power from the catback than the y-pipe. Nissan upgraded the flow characteristics of the y-pipe when they installed the larger engine, but they didn't touch the stock catback so it went from fairly adequate to pretty restrictive."

Sooooo you may want to rethink a Catback regarding the noise, I have a Frankencar catback and it's barely any louder than stock at all, my Injen is waaay louder. I have never yet had a passenger notice that I have an aftermarket exhaust from the sound only by looking at the tips. I understand the Cattman catback is marginally louder than the Frankencar, so I'd recommend that would be the way to go, especially since Frankencar's are unavailable.

F23A4

I have a dyno jpeg and Excel spreadsheet from Brian showing a peak 4.6hp/8.4lb-ft gain for Y-pipe on the 4AT 02-03 Maxima, with the Y-pipe being the only mod. However, the whp gain between the 4k-5k rpm range averages 9.2whp with a 15.8whp increase over stock at 4400rpm alone (@ the same rpm, there is an 18.9wtq gain over stock). Again, this is for the 4AT 5.5G....I imagine the 6MT would show slighty better gains.

The Cattman Y pipe may not be as effective on the 5.5G Maxima as it is with the 4G and 5G but, it seems to work plenty well for me.

F23A4

...also, my 02 Maxima w/Cattman Y-pipe is only louder than stock at WOT.....even with a Injen CAI.