Intake & Exhaust Questions and info regarding various aftermatket exhaust systems for the G35 (Headers,Y-Pipes, and Cat-Back Systems)

Exhaust: Shop smart instead of following the crowd

  #76  
Old 05-23-2019, 11:56 AM
cswlightning's Avatar
Registered User
Join Date: Jul 2017
Location: Southern Maine
Posts: 914
Received 96 Likes on 89 Posts
The X pipe makes the biggest difference for sure. Replacing the rear mufflers brought it down to OEM noise level while cruising, can easily sit at 6k on the highway and if I'm not deep into the go pedal it doesn't really sound like I'm doing anything stupid. But it's still much deeper sounding at low RPMs and is slightly louder at WOT than OEM for sure because it's all straight through glasspacks. My goal was "BMW" exhaust and I think this performs similarly to a BMW exhaust with a muffler/resonator delete. I like it for my daily driven commute racer, but it's a little too quiet now with stock cats for a weekend car.... not that I'm trying to call attention to my Bondo'd up shitbox anways...
 

Last edited by cswlightning; 05-23-2019 at 04:36 PM.
  #77  
Old 05-24-2019, 12:49 AM
Urbanengineer's Avatar
Super Moderator
iTrader: (3)
Join Date: Jun 2013
Location: OH-IO
Posts: 9,963
Received 807 Likes on 758 Posts
My G with the OE cats and HKS Rep with Magnaflow X pipe is probably 30-40% louder than stock.

It does drone under load though. Zero rasp though. AUTO TRANS!

DID I MENTION MY $2000 (Motordyne) SET UP RASPED!!!! SORRY TONY!

Perhaps I should consider some chambered portions back there to quiet some of the drone. Meh. Thanks CWS.
 
  #78  
Old 05-24-2019, 09:37 AM
Registered User
Join Date: Nov 2017
Location: Ft. Lauderdale
Posts: 87
Received 8 Likes on 8 Posts
The main issues I see with Bolt on exhaust is that they mostly copy each other, changing very little over time.

The main changes that produce results are H or X pipes, single or twin exits and resonators.

The best combos i've heard on VQ's has been custom X pipes long cherry bombs into inline canisters or Y to lengthy cherry bomb to inline canister.
 
  #79  
Old 05-28-2019, 11:33 PM
Urbanengineer's Avatar
Super Moderator
iTrader: (3)
Join Date: Jun 2013
Location: OH-IO
Posts: 9,963
Received 807 Likes on 758 Posts
Originally Posted by BULL
The main issues I see with Bolt on exhaust is that they mostly copy each other, changing very little over time.

The main changes that produce results are H or X pipes, single or twin exits and resonators.

The best combos i've heard on VQ's has been custom X pipes long cherry bombs into inline canisters or Y to lengthy cherry bomb to inline canister.
Do you mean in line chamber exhausts portions? I am confused lol.

But I would believe it.
 
  #80  
Old 05-30-2019, 09:37 AM
Registered User
Join Date: Nov 2017
Location: Ft. Lauderdale
Posts: 87
Received 8 Likes on 8 Posts
Originally Posted by Urbanengineer View Post
Do you mean in line chamber exhausts portions? I am confused lol.

But I would believe it.
Yes, inline resonators.

The issue is space as you know funneling both banks to 1 resonator can be complicated. Resonator would have to be at least 3 in.
I feel like resonated test pipes are a waste. The only time they do work is if there is no other resonance or limited.

 
  #81  
Old 05-30-2019, 10:57 AM
Urbanengineer's Avatar
Super Moderator
iTrader: (3)
Join Date: Jun 2013
Location: OH-IO
Posts: 9,963
Received 807 Likes on 758 Posts
Originally Posted by BULL
Yes, inline resonators.

The issue is space as you know funneling both banks to 1 resonator can be complicated. Resonator would have to be at least 3 in.
I feel like resonated test pipes are a waste. The only time they do work is if there is no other resonance or limited.
I would do separate resonated chamber sections like CWS did. The j pipe resonators are improperly sized on the HKS reps... pretty much just for looks.
 
  #82  
Old 06-02-2019, 05:34 PM
joeb1983's Avatar
Premier Member
iTrader: (3)
Join Date: Sep 2011
Location: Oklahoma
Posts: 411
Received 32 Likes on 27 Posts

Full setup awaiting install.


O2 bungs installed on Y-pipe for wide-band gauges.

Y-pipe collector

Header collector. Spike style since FId.

Resonator per the advice of Nik.
PPE steppes long-tubes, SOHO Y-pipe and single exit w/ resonator.
 
  #83  
Old 06-05-2019, 12:52 PM
Registered User
Join Date: Nov 2017
Location: Ft. Lauderdale
Posts: 87
Received 8 Likes on 8 Posts
I will probably hear you all the way from Florida.
 
The following users liked this post:
Scottwax (06-05-2019)
  #84  
Old 06-14-2019, 03:28 PM
joeb1983's Avatar
Premier Member
iTrader: (3)
Join Date: Sep 2011
Location: Oklahoma
Posts: 411
Received 32 Likes on 27 Posts
Originally Posted by BULL View Post
I will probably hear you all the way from Florida.

Haha! Its going to be a banshee that's for sure.

Paul w/ PPE Engineering was awesome; ensuring the long-tubes where built to my specs. The build quality is absolutely top notch and I couldn't be happier with them.

Nik w/ SOHO Motorsports was the same. Lead time was right on the money and every single section arrived flawlessly. No dents, dings or scratches. Superb build quality as well.

The setup I've been running for years has been Stillen shorty headers, Berk HFC's (Until they self destructed), Z1 TP's and a Boral cat-back.

It's definitely going to be the polar opposite.

I'm now at a crossroads... Is now the time to fully build the VQ and upgrade the blower?..

If I could do it all over again, I would have simply swapped in a 2J with some headwork and a single conversion. Oh well... Too deep to turn back now.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Marlin84
Wheels & Tires
33
05-24-2019 12:55 PM
Dallsinghjr1
G35 Coupe V35 2003 - 07
10
09-17-2016 09:39 AM
suby01
Not G35 Related
3
05-25-2016 03:07 PM
DRG35R
Wheels & Tires
19
01-31-2016 07:14 AM
AL8782
G35 Coupe V35 2003 - 07
4
10-03-2015 10:26 AM


Thread Tools
Search this Thread
Rate This Thread
Rate This Thread:
You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Exhaust: Shop smart instead of following the crowd


Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: