I have recently installed the Warpspeed Y Pipe on my Maxima. Great product and has helped produce a decent amount of HP. I decided to keep the stock cat, it was still in good condition and I didn't have any flowing problems with it. To cap it all off, there is a Stillen muffler, which was there when I bought the car. However, The noise is really starting to get to me. Come to find out my Stillen muffler was not designed to work with a high flow system. It was designed more for a stock cat back and since I replaced everything from the cat forward it makes a lot of noise, and even sounds raspy when I get on it.

From all the research I have done I have come to find out that my problem is due to too high of flow. There is nothing really creating a lot of back pressure to help reduce the noises coming from the engine. This seems like the right idea. In addition, I have nothing to brake up the sound other then my cat, which seems to be doing a horrible job at that. But I like the high flow!

There are several options that could help with my problem. I could go with a Glasspack, Resonator, or new muffler. Having no experience in exhaust systems I want to see what some of you guys have done to help with the sound. Each technology is slightly different and designed for specific applications or to solve specific problems. I am wanting to keep the system as high flow as possible. Putting a new muffler on the end that is restrictive is destroying everything else I have done.

What have you guys done in the past and what has worked and why? I have posted other places and someone will say get a resonator, then someone will post and say a resonator doesn't do anything. People will go back and forth on everything so please only post if you have actual experience with this or exhaust systems and know what each of the possible solutions will or could do for my situation. I don't have a lot of money but have enough to do one option and I would like that option to work. I took my car to a shop that does mufflers and all they said was he didn't know what any of his products would do in my situation and I should try each one of his products until I find one that works, at 250-300 dollars a pop!

Thanks

 

Put on a stock muffler.

I have a Y-Pipe and high flow cat, the loudest thing on my car is the SRI, and that's really where all the cabin noise comes from.

You can have full aftermarket exahust, but with a OEM muffler your noise will be very low compared to the aftermarket ones.

Give me a min while I dig up the website I got that info from.

 

You can try and get a 24" resonator/b pipe. They are fairly cheap from summitt racing.

 

http://greghome.com/Greg's%20Garage/...nce%20Mods.htm

Read there.

[edit] IIRC and if you're really concerned about "backpressure" you can put on a 5th gen muffler, which flows a little bit better, but still a muffler has minimal gains, and with a Y-Pipe, it's just not worth it with the sound to go aftermarket, unless you like the sound of course.

 

Wow that hit it right on the head. My exact problem. He even had the same muffler I currently have.

Thanks for the link. Someone should put that in the How To section as a bit of information for people who are putting on a new Y pipe.

 

It is... Kinda... I got it when I was bored reading the how-to's, and it's from the "how-to install a b-pipe".

But you are right though, that page should be more easily accessible through the FAQ (mods: hint, hint).

 

try a 5th gen stock muffler...they have good flow and arent noisy until you get on it ive got a magnaflow muffler i just put up a video in members rides of the exhaust note

but the link is http://vids.myspace.com/index.cfm?fu...deoid=63426186

 

I'm going to have to check. When the last owner installed the Stillen he upgraded tubing as well. I dont know if it will fit a stock muffler anymore. But it sounds like I'm going to go back to a stock muffler, the 5th gen from what you guys are saying. Thanks for all the support. Now I just need to find one. I'll check with the 5th gen guys.

 

dude....get a dynomax super turbo (street version) . They are quiet like stock but still provide high flow and only costed me like 30 bucks on cheapbay (ebay). ***note that the dynomax super turbo sport version gives you the same performance AND more sound.

I have the street version but i didnt enlarge my pipe or remove the resonator. So i had basically no sound. I installed a resonator tip on the muffler to get a lil sound (like u can kinda hear it if u are a lane over but not really). W/o the tip i dont think u wd hear really anything at all. My cold air intake is MUCH louder.

But ur system is different so i think the street version will sound louder with ur car but not ugly loud like a racing bullet. Like u can hear the exhaust note if u are lane over. The sport version will sound even louder, but still the same noise range. They are good high flow classy looking mufflers.

Maxi's are classy and NOT freakin hondas.

 

Anyone know how many SCFMs the Stock mufflers produce? 4th and 5th gen

 

wtf is a SCFM? do u mean CFM cubic feet per minuet?

 

Sorry, I'm pretty new to exhaust systems.

When you say Y-Pipe are you referring to the manifold?

I need to do some replacing to my system so i'm trying to learn more.

 

the manifolds are what get replaced with headers the y-pipe bolts to the headers or stock manifolds (witch ever u have) and goes back to your cat. the B-Pipe goes from your cat back to the rear axle then the muffler/tail pipe goes from the B-Pipe to the bumper.

im pretty new here as well but from what i have head headers do not provide much more power over stock manifolds. the Y-pipe seems to make the most difference in the exhaust system on these cars and seems to be the best bang for your buck as far as performance goes.

 

Well I have been doing a lot more research and narrowed it down to two options. New Dynomax Super Turbo Muffler or a 30" glass pack.

I talked with a muffler installer yesterday for about 20 minutes. He's been doing this for over 35 years and said that both would do about the same amount of sound deadening. He also says that both options would allow the same amount of flow through the system, but I personally think the muffler would have more back pressure.

So now the question is, which product do I go with? Should I get the glass pack or should I get the muffler?

 

Adding the glass pack, if you have none right now, would cut down noticeably on the noise and raspiness, and you'd probably like the tone better than just replacing the muffler.

I recommend the Dynomax Thrust glass packs, or if you want a bit more quietening, the Summit resonators. The Dynomax's will flow better, but as mentioned, the Summit would quieten a bit more.

 

It's quiets your exhaust with less flow due to a nonperforated design but rather with louvers which are placed in the airstream thus creating turbulence. Thrush/Vibrant/Magnaflow are the best choices.....

 

Here is my 2 cents I have a very similar setup.

A little history.
I started with all stock exhaust and replaced the Y-pipe first with a warpspeed Y this was after they claimed to have fixed the bees in a can sound. I put it on and I got a deep semi noticeable sound A slightly louder than stock sound but I was a good deep sound coming from the area of the y pipe. Next I bought a stillen SS B-pipe with no resonator. I wanted to keep it as quiet as possible and I thought removing the resonator would make it a lot louder due to the fact that the stillen B + the stillen muffler is almost the loudest thing you can put on the maxima. But stillen B + stock muffler = stock sound. It was almost as quite as stock the only difference is at high rpm full throttle it would start to get louder over the stock setup. But day to day driving 0 difference. FYI the nice thing about the stillen B is that it is an exact bolt up to the nissan 4th gen stock muffler. I have heard the 5th gen requires modification to get it to fit you may want to check that. I then considered a new muffler, I have this complete free flowing exhaust why should I have a stock muffler bottleneck? So i took the muffler off drove it with earplugs (I didn't want the loud sound to be mistaken as more power) put the stock muffler back on drove it and took it off again. I couldn't tell any difference. I recommend the stillen B with stock muffler it is the way to go hands down. and I don't know that many that have this setup. I got the idea from the website posted earlier. If I had to do it over again I would go with the SS warpspeed y-pipe

 

Yup, that's exactly why. Louvers vs. perforations.

 

Well I finally did it. I took my car to the muffler shop and got a 24" glass pack installed. It worked like a charm. For only 100 bucks my car sounds amazing and has this nice low rumble at idle and on the road. Not annoying by any means, almost soothing and screaming I've got some power under here. I Would recommend the setup.

Warpspeed Y Pipe - Stock Cat - 24" GENERIC glass pack - Stillen Muffler

 

I'll be the first to say it... Post a video!!!!!!!!!

 

+1

 

Here ya go. Enjoy!
http://www.youtube.com/watch?v=bczqkAZi3bI

 

i cant get to the video!!!! F**K. i wanna hear it.

Did u replace the resonator with a glass pack??

 

I think the guy before me eliminated the rez and put a 2.5 inch pipe all the way back to the muffler. I put a glasspack where the OEM rez was, i think...

 

Moar!!! But nice idle though! Especially since you have the y-pipe.