Thinking about a custom 3" exhaust
 

Hey guys I was thinking about doing a custom 3" on my Z I just got as soon as break it in at 500 miles already :tup::driving:. I was speaking to my muffler shop about it he said he could do it (Mike's Muffler in El Monte California) a lot of guys here know him one of the best in the SoCal. So here is my question I want to do a 3" full exhaust except oem Y pipe and cats which I will be getting some berk HFC soon. He told me he can put something together, however I was thinking about buying the mufflers myself, I have a few in mind I was wondering if any of you would recommend me one from experience. HKS hi power Carbon version, Greddy Ti-C (just mufflers) Apexi N1, or any suggestions?

Or should I just get a Agency power exhaust with the test pipes and be done with it lol.
One last question what do you guys think of a single exit instead of a duel on our cars good or bad idea? I know this one is just an opinion just want to see what you guys think.

I just saw a thread about a single turbo 370z the guy has the HKS single exit looks and sounds sick with a magnaflow 18" resonator. I am not boosted and not planning on any time soon. Do you think with a 3" single after the Y pipe I will lose too much back-pressure and actually lose power instead of again? My whole goal here is power again and weight lose, because I will be tracking the car as much as I can afford too.

Of course.. three inch exhausts are for FI. You can do it, but if u r tracking? There will be a penalty with the 3".

I will not be boosting for a while (1 year or so maybe longer) but I will be adding a few bolt-ons just to give me a little edge. I want to know without a turbo or SC with a 3" single pipe from the Y-pipe back with a HKS muffler would I lose power or I will have enough pressure?

I bought the HKS-Hi power for my car last summer. It sounds amazing. It was a little quiet for me though. AK does a pretty good review He kind of sold me on it. Last weekend I added some Berk high flow cats and wow the car sounds amazing. I have no complaints with the exhaust and have no plans for ever taking it off.

Not sure why you would do a stock Y and 3" back. You would still be restricted at the OEM y-pipe.

As far as custom shops go, you have to make sure they are mandrel bending the piping or it would be no different than going with a smaller diameter pipe since all the crush bends would lower the diameter.

Looks like your in Glendale CA. Fast Intentions is the way to go. If you are in CA, take a little ride & go talk to Tony or give him a call, He really is the man & you aren't going to find better quality or service. He's too close not to look into. :tiphat:

I will be changing the Y pipe later on to something bigger for sure. Because from the Y pipe back it's going to b a pretty straight pipe going to the back with a little curve to the HKS muffler and out. There is going to be a lot of free flow therefore, I was asking to see if a none boosted car would actually lose power that way or not?

And yes I know Tony and will probably go to him also before I make my final decision but I wanted to know for sure if my idea of the 3" single would lose lower or not.

To answer your question as bluntly as possible, yes, you will lose lower end torque and overall power by going with a 3" exhaust with no forced induction.

I'd be curious to here what he has to say. A single 3" has a smaller overall diameter than a dual 2.5"...

Whatever you go with, a good tune will bring you back in line.

If you do single exit, you should probably get a rear bumper that isn't shaped for two exits. I would personally tip my hat to a single exit Z as I've never seen one before.

There's a few on here. Check out O&G's Z.

http://i251.photobucket.com/albums/g...350zer/005.jpg

just my opinion, but single exit throws the whole look of the car off...not very aesthetically pleasing unless you have the bumper thats meant for it

More info here...

http://www.the370z.com/intake-exhaus...too-big-n.html

:iagree:, but if you like that all that matters

The standard, non-Nismo, Y pipe is kind of small. When I swapped in my second-hand Nismo exhaust I was impressed by how much larger (particularly the H pipe) and less constricted it was and how its pipe diameter (larger) was a better match for the stock cats. You can often find take-off Nismo exhausts for about $400, just make sure it isn't dinged up. Since the Nismo exhaust is stainless steel it lasts practically forever too. It has nice large "Nismo" logo tips and if you take care of it you can sell it for what you paid if you ever go F.I. If you're into that sort of thing, it makes your Z "Nismo Equipped" too.

Spoiler alert: It's not very loud but you can always do the 'washer mod" for a bigger sound.

I love my single... It does feel like it has a little less torque down low, but honestly it blows the tires off so easily it doesn't even matter.

With the weight savings and the sound it makes, I'm super happy. Only down side is that it brings the noise into the cabin more than it did with the Stillen.

http://i51.photobucket.com/albums/f3...Z/d06fc034.jpg

Sound clip:

http://i51.photobucket.com/albums/f3...h_ca20cb85.jpg

Since I'm getting all kinds of crap from all my friends for wanting a single exit I'm thinking about doing a full 3" catback dual with Vibrant resonators to quite it down a bit with the HKS mufflers. What do you guys think of that combo? Or should I just buy the Agency power catback and be done with it?

I can tell you one thing, it will be defeaning loud.

Just get a proper 2.5" catback with the new x-pipe from FI and you'll be more than pleased

I'm running a Vibrant resonator and buddy club pro 3inch muffler. I have 2.5" from the HFCs into a Y with a 3 inch flange all the way to the bumper.

I would be willing to be my setup makes more power than a Stillen CBE or Invidia...ect.

I'm surprised that one of the off the shelf cat backs won't do the job for you. If you guess wrong on the design you'll get some major league drone and rasp, as many one this forum have already seen.

Well I really wanted a single exit in the beginning but since my friends are all giving me crap about the car lookig rice... I decided to go with something I like which is the Hks mufflers and I really want to run 3" piping or at least 2.75 most of the aftermarkets are 2.5"s my other choice is the Greddy TI-C but that thing is so expensive I would love to get that but the price is a bit much. My last choice is the AAM 3" which the cheapest I found was around 1200 shipped which I still think is too much. But idk I'm still decided my last choice is the Agency Power which again is 2.5" and comparted to my other choice is the cheapest under $800 bucks shipped. B

Yea, this stuff can get expensive. If you are after power I think you'll be better off with a Stillen or other major brand with a history of success on the dyno. If you are after a unique look and sound then you could change out the factory muffler and install new mufflers and tips reusing the factory resonators and mid pipe. As far as I know 3" pipes are generally considered too large for most non boosted applications.

As to price, Stillen and others, periodically have sales and package pricing that can save you significant dollars.

cnt or topspeed are the best bang for the buck exhausts for this car. PLUS topspeed just came out with a new system

Nissan 370Z Z34 09-11 Top Speed Pro-1 Catback Exhaust System Systems Resonators | eBay

or

CNT Racing Catback Exhaust - CB-370Z - Nissan - 370Z - From: 2009 - To: 2011 | NextGenTuning.com

both IMHO sound 10x better than Agency powers system on these cars

Ended up deciding on going with the single exit 3" with the HKS Carbon Hi-power muffler and Motordyne 3" resonated Y-pipe. Will be adding HFC soon only reason I can't go with TPs is because the race track I go to they wont let me run my class if I don't have cats. I will post of the whole build guys as many pics as possible. And BTW spoke to a couple of shops about losing power with a single 3" they all assured me that with that setup the only loss will be weight :)

Thank you for the help.

Bump for any advice before I start the build?

Here is mine guys finally done with the stock cats 2012 Nissan 370Z 3"Single exit exhaust - YouTube info in the description

nice!

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Sound good Mino. Are you going to do anything with the blank side?

I'm thinking about maybe doing the Amuse rear and covering up that side or just get a diffuers and cover it up I don't know yet still thinking.

I've seen a few people weld tow hooks in the blank spot, my setup is function > form! I could care less if there is an opening there, people get a good look at it because that's all they ever see ;)

http://i251.photobucket.com/albums/g...350zer/116.jpg
http://i251.photobucket.com/albums/g...350zer/026.jpg
http://i251.photobucket.com/albums/g...1333731147.jpg

I have to agree with you on the function>form part :driving: I really don't care about that open stop. However I am thinking about doing the amuse rear and if I do I will have the shop close the little part on the right side and on the amuse I'm sure this thing will look a lot better

Just put a tow hook in that open spot!

Lol or that :tup:

What about a rear bumper tuck? havent seen it on a z34 but with a single out back and some struts would look nice.