Y-Pipe, is it a HP improvement?

[vflores]

Yo, I've been considering purchasing a Y-Pipe for my 08 Altima Coupe (3.5) it has a aftermarket cat-back. QUESTION: Has anyone installed a Y-Pipe with a NON STOCK cat-back/muffler on their Altima 3.5 Coupe? If yes, please share your wisdom. Would you advise if the Y-Pipe produced increased torque and/or horsepower? Or decreased either? My concern is, with the Nismo cat-back and adding the Y-Pipe, I will loose compression and in turn, loose torque and naturally horsepower. Thank you for your time.

[Hussain]

the Y-pipe doesnt come with a cat-back, it deletes the cat and increases the diameter of the piping BEFORE the cat. so the cat-BACK stays the same, just with no cat lol i had a local shop take off my cat and then later put it back on (i want to take it off again) but the experience i had was a huge gain in high RPM power but a loss in low end power. but i didnt have a Y-pipe, just deleted the cat.

[rjdmmfl1]

there's a good number of folks on here that have the Y-pipe installed , some have factory exhausts, some have aftermarket cat-backs, and some have axle-backs.... from most reviews, there is a noticeable increase in HP, some say throughout, but definitely at the top end... do a NICO search and check out the reviews

[Hussain]

there's a good number of folks on here that have the Y-pipe installed , some have factory exhausts, some have aftermarket cat-backs, and some have axle-backs.... from most reviews, there is a noticeable increase in HP, some say throughout, but definitely at the top end... do a NICO search and check out the reviews

that was nice. lol lately ive seen a trend of new members getting treated like s*** when they ask a question (not by you, by other members).

[vflores]

I do appreciate your advice and will do further research on the Y-Pipe. Being new, I lack the realization of the extensive historic info within this site. Thanks again for your time and help.

[Hussain]

not trying to get on your case, just letting you know that you should resize the pic in your signature... theirs a lot of useful information on here but there are also a lot of ppl who sometimes dont have the nicest things to say and ive seen them give ppl a hard time for a having a big picture in their signature.

[XXplosive990]

i've got the y-pipe with a stock exhaust and it definately felt faster. most of the power was at high RPMs though. i didnt really feel like i lost any in the lower RPMs

[vflores]

My pic, yea I understand it's a bit large. I will fix it, I just have to figure out how, I finally got it to appear, just now have to correct it, thanks for the heads up.

[vflores]

XXplosive990, thanks for the advice. I did a search and didn't really find Altima with Y-Pipes, your advice matches what I read that Maxima's experience so, I am leaning on going ahead and getting it for my car. Thanks!

[Hussain]

if you're using a pc, just right click on the pic and then click "open in pain" and then in paint you can resize it. then you have to upload it to photobucket again

[nurseryboy]

Here's a 15 page thread about the Racingline Y-Pipe: http://forums.altimas.org/zerothread?id=367499

I also have a 3.5 with Nismo cat-back and I also have the Y-Pipe. I had only the Nismo on the car for a few months before the Y-Pipe came out, so I was able to compare the differences between just the Nismo and the Nismo w/ Y-Pipe. Needless to say, it's a very noticeable difference. It definitely did not decrease HP or torque at all, and did quite the opposite in my opinion. It's one of the mods you can actually feel a difference with. It also changed the sound of the exhaust quite a bit. I wasn't a huge fan of it first (louder and more throaty), but I've grown to love it. Not that my car is anything like a Ferrari, but I had some fun with a F430 a while back and I swear, my car sounded just like it. (That's not just me thinking I have something more than I do. It really did sound like it.) So, long story short, it's a good purchase for both performance and sound in my opinion!

[Hussain]

got any vids of your car car with the nismo cat-back and Y-pipe... i want to see how it sounds.

[nurseryboy]

No, I don't have any vids of my car, but here are a couple from YouTube that are pretty much the same (3.5 w/ Nismo and Y-Pipe):

http://www.youtube.com/watch?v=bqXr-gj90zo http://www.youtube.com/watch?v=n4WMAXW1pu0

[blackteam02]

that makes the nismo sound good! thumbs up ..i wonder how the ypipe would sound with my exhaust?! theres a vid up on youtube but the sound quality is bad.

[vflores]

Hey "Nurseryboy", I have a question about you car. I hope I didn't ask you this already. You mention that you have the same set up as I do, I read you have a aftermarket cold intake too, has your car idle a bit rougher? Someone wrote me that I could have mishandled the Mass sensor or I need to redo the "Mapping" using an electronic tool (which I don't have) per MS manual, just wondering if a bit more engine feel is the charter of the changes. Thanks.

[Racingline]

Deleting of the cat only contributes to about 6hp gain at the wheels, as shown in the long development thread, our "V1" Ypipe only gained just under 8hp. With some reworking of the bends on the primaries we were able to achieve an additional 6hp by changing pipe diameter and merger locations.

As much as some might like to think that we are charging $289 for nothing more than a pipe with no cat, there really was alot of time spent on R&D with this pipe to make the most power possible with virtually no low end loss at all. We also use a lined interlocking flex section as opposed to the traditional corrugated/braided, which also helps with a smoothed air flow with no buzzing sounds. The flex is also alot stronger and will last longer than traditional braided flex.

[nurseryboy]

Hey "Nurseryboy", I have a question about you car. I hope I didn't ask you this already. You mention that you have the same set up as I do, I read you have a aftermarket cold intake too, has your car idle a bit rougher? Someone wrote me that I could have mishandled the Mass sensor or I need to redo the "Mapping" using an electronic tool (which I don't have) per MS manual, just wondering if a bit more engine feel is the charter of the changes. Thanks.

I really haven't noticed any difference in my idle with the mods. The intake was the first mod I did, and the install went very smoothly and I didn't have any issues with the MAF sensor, so I'm not sure what to suggest if you ran into any issues with the intake install. But, I think I've read (on these forums) that "remapping" the MAF sensor (or at least getting the ECU (computer) to relearn the sensor) only takes unhooking the battery for a while. I'm not positive about this, though, so don't take my word for it.

But, to answer your question, no, I haven't noticed any difference at all with my idle. The car seems to adjust accordingly and keep the revs where they're supposed to be. I can change my idle rpms through my Bullydog tuner, but I haven't had a need to.

[maxentropy]

nurseryboy - from 1-10 (10 being loudest) how loud was your NISMO alone and then from 1-10 how loud was your NISMO exhaust and acingline YPIPE?

I've got a borla exhaust and it sounds sweet as hell. My Ypipe is sitting in my garage waiting for a warmer day but I'm afraid it'll be too loud that I'll grab unneccessary attention from cops and the like once its on...

[rcboy514]

http://www.youtube.com/watch?v=n4WMAXW1pu0

I like this one...

[nurseryboy]

Hmm. That's a tough one as I'm sure it's all in the eye (ear) of the beholder, but to me personally, the Nismo alone was probably around 7, and with the Y-Pipe it's around 8.5 or 9. (If 10 was the loudest I'd be comfortable with, not how loud cars can get (without exhaust or whatever).) I'm not a huge fan of loud, though, so my numbers may be a little skewed, but this setup has really grown on me. The nice thing is it's quiet if you keep the RPM's down. But, if you get on it, people notice The Y-Pipe definitely made it sound more aggressive (like a bigger engine with a little more "gurgle"), and downshifting sounds really awesome It really did change the sound of the Nismo, and for the better, in my opinion.

It's kinda hard to explain sound to someone else. What may be loud to me may not be loud to others, but I think those YouTube videos do a pretty good job of expressing the sound. The mic on a videocamera obviously can't pick it all up, but it's pretty close.

[maxentropy]

Gotcha, thanks for the explanation and your thoughts. I'm looking forward to what this baby sounds like with my borla because honestly my borla sounds like sex already.

[nurseryboy]

Sure. And yeah dude, I bet it's gonna sound incredible. Let us know what you think once you get it installed!

[blackteam02]

My Ypipe is sitting in my garage waiting for a warmer day but I'm afraid it'll be too loud that I'll grab unneccessary attention from cops and the like once its on...

Hey if you too scared to install it , shoot me an email ill buy it from you..@ a lower price than racingline of course .

[leifab]

just put mine on about 2 hours ago and i can honestly tell ya it doesnt really increase the sound all the much with the stock exhaust

[soxypoo]

wait for a day or 2 you will hear it , i got my with stock exhaust for now ..... wait til spring to get the nismo exhaust

[leifab]

already got springs...waiting on IRS to get the nismo exaust

[Racingline]

Borla + Ypipe http://www.youtube.com/watch?v...lated

Nismo + Ypipe http://www.youtube.com/watch?v=n4WMAXW1pu0

STillen + Ypipe http://www.youtube.com/watch?v=QGGLGwvfD8g

best I could find at the moment

[nurseryboy]

Borla + Ypipe

http://www.youtube.com/watch?v...lated

That sounds awesome!

[Andy_G]

My only concern with the Y pipe is whether or not it will pass inspection without the Cat?

Does anyone in TX know?

[rjdmmfl1]

can't wait to hear what the Y-pipe does with the ebay special exhaust.. the ebay exhaust sounds like NOTHING when revving without a load, but under load, its sounds decent (especially for me and my audiophile needs)

I hope the Y-pipe doesn't make it too much louder, that would really suck for me!
Modified by rjdmmfl1 at 8:45 PM 1/18/2010