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

350Z HR Y-pipe installed on a 2003 G35

  #16  
Old 09-22-2008, 11:30 PM
Registered User
iTrader: (2)
Join Date: May 2007
Location: DC Metro/Maryland
Posts: 851
Likes: 0
Received 0 Likes on 0 Posts
I guess I need to find someone selling an OEM Y-pipe from an HR...
 
  #17  
Old 09-23-2008, 12:00 AM
Registered User
iTrader: (6)
Join Date: Jul 2008
Location: Indianapolis, IN
Posts: 141
Likes: 0
Received 0 Likes on 0 Posts
I sell cars at a Nissan store and we have a full HR exhaust (Y-pipe, midpipe and muffler) in parts right now that was leftover when we put a full Nismo setup on a customer's '08 Z. The entire system has only like 600 miles on it. I found out we had this after I ordered a coupe midpipe from someone here. After reading this thread, I am going to have that Y-pipe put on this week and see how it works for me. I have stock cats and an 04 coupe midpipe on my 03 sedan. I will update if anyone is interested... Let me know.

Thanks for the info and idea, Dave.
 
  #18  
Old 09-23-2008, 11:37 PM
Registered User
iTrader: (3)
Join Date: Sep 2005
Location: Long Island, NY
Posts: 5,773
Received 46 Likes on 31 Posts
nice. i noticed a minor difference w/ the '06 coupe y-pipe on my sedan.
 
  #19  
Old 09-24-2008, 12:29 AM
Registered User
Thread Starter
iTrader: (9)
Join Date: Aug 2003
Location: Kansas City
Posts: 6,573
Likes: 0
Received 65 Likes on 44 Posts
For those that think Nissan doesn't know what it's doing in terms of exhaust flow, take a look at the merge collector of the HR Y-pipe. It doesn't get any better than that. Period. Both Y-pipes have similar merge collectors.

 
  #20  
Old 09-24-2008, 12:31 AM
Registered User
Thread Starter
iTrader: (9)
Join Date: Aug 2003
Location: Kansas City
Posts: 6,573
Likes: 0
Received 65 Likes on 44 Posts
Originally Posted by da mayor
nice. i noticed a minor difference w/ the '06 coupe y-pipe on my sedan.
I thought the 1st gen coupe and sedan shared the same y-pipes?
 
  #21  
Old 09-24-2008, 12:40 AM
Registered User
Thread Starter
iTrader: (9)
Join Date: Aug 2003
Location: Kansas City
Posts: 6,573
Likes: 0
Received 65 Likes on 44 Posts
Well, I can confirm two things:

1) This y-pipe definitely makes the exhaust louder. There is also slightly more drone in the low rpms (1800rpms and less) under heavy load. Don't get me wrong though, this setup is not annoyingly loud at all and under a cruise it's basically like stock. Put your foot into it even 20% and you'll some warble. Bury the throttle and it's louder than a stock 350Z at WOT.

2) My original statement that the HR y-pipe appeared to reduce NVH (specifically vibrations and harshness) is false. After 4 days, I don't notice any real change.

As for performance, I swear the car feels punchier, especially in the lower rpms plus it sounds great at WOT. This experiment was definitely worth the $50.

Maybe some others that have or will do the swap with chime in later.
 
  #22  
Old 09-24-2008, 08:51 AM
Former G35driver Vendor
iTrader: (27)
Join Date: Jan 2006
Location: Louisville, KY
Posts: 4,979
Received 24 Likes on 23 Posts
searching for one as we speak...
 
  #23  
Old 09-29-2008, 09:46 PM
04G35NYC's Avatar
Registered User
iTrader: (17)
Join Date: Jun 2006
Location: Brooklyn,NY
Posts: 4,842
Received 77 Likes on 73 Posts
can you post some before and after sound clips if you can hear the difference with them i am very interesting i can get one from a friend that ungraded his g37 exhaust.
 
  #24  
Old 09-29-2008, 10:41 PM
Registered User
iTrader: (5)
Join Date: Jun 2005
Location: Meifumado
Posts: 1,488
Likes: 0
Received 1 Like on 1 Post
Originally Posted by Hybrid_DET
searching for one as we speak...
They are very cheap and easy to get. At the dealership I work at we have many that get piled up from exhaust installs and eventually get hauled away by scrappers. You can also buy it new from an OEM supplier for less than $100

As for any performance gain from the swap, I highly doubt there is any. This isn't even going to gain you 1-3whp, and even if it did, you couldn't feel it.

I would like to see more proof than:

Originally Posted by DaveB

As for performance, I swear the car feels punchier.
 

Last edited by jonnylaw; 09-29-2008 at 10:46 PM.
  #25  
Old 09-29-2008, 11:58 PM
Registered User
Thread Starter
iTrader: (9)
Join Date: Aug 2003
Location: Kansas City
Posts: 6,573
Likes: 0
Received 65 Likes on 44 Posts
Originally Posted by jonnylaw
They are very cheap and easy to get. At the dealership I work at we have many that get piled up from exhaust installs and eventually get hauled away by scrappers. You can also buy it new from an OEM supplier for less than $100
Uhhh.....try $330-430 from Nissan


As for any performance gain from the swap, I highly doubt there is any. This isn't even going to gain you 1-3whp, and even if it did, you couldn't feel it.

I would like to see more proof than:
You're probably right about the power gains, but I can tell you there is definitely improved low rpm throttle response with this y-pipe and there is a change in exhaust noise. For $50, it was worth the money. It's one of my favorite mods and this is coming from probably the most critical person on this website.
 
  #26  
Old 09-29-2008, 11:59 PM
Registered User
Thread Starter
iTrader: (9)
Join Date: Aug 2003
Location: Kansas City
Posts: 6,573
Likes: 0
Received 65 Likes on 44 Posts
Originally Posted by 04G35NYC
can you post some before and after sound clips if you can hear the difference with them i am very interesting i can get one from a friend that ungraded his g37 exhaust.
Will do as soon as I find some time. My daughter was born on Friday and I've been a busy man for the past few days.
 
  #27  
Old 09-30-2008, 12:14 AM
Registered User
iTrader: (22)
Join Date: May 2004
Posts: 2,239
Received 3 Likes on 2 Posts
Originally Posted by DaveB
Well, I can confirm two things:

1) This y-pipe definitely makes the exhaust louder. There is also slightly more drone in the low rpms (1800rpms and less) under heavy load. Don't get me wrong though, this setup is not annoyingly loud at all and under a cruise it's basically like stock. Put your foot into it even 20% and you'll some warble. Bury the throttle and it's louder than a stock 350Z at WOT.

2) My original statement that the HR y-pipe appeared to reduce NVH (specifically vibrations and harshness) is false. After 4 days, I don't notice any real change.

As for performance, I swear the car feels punchier, especially in the lower rpms plus it sounds great at WOT. This experiment was definitely worth the $50.

Maybe some others that have or will do the swap with chime in later.
I guess, money well spent? =)
 
  #28  
Old 09-30-2008, 12:17 PM
5150DS's Avatar
Registered User
iTrader: (1)
Join Date: Aug 2005
Location: So Cal
Posts: 3,984
Received 161 Likes on 131 Posts
Originally Posted by 04G35NYC
can you post some before and after sound clips if you can hear the difference with them i am very interesting i can get one from a friend that ungraded his g37 exhaust.
The part he is talking about is from the 3.5 hr motor. Don't know if the one on the G37 is the same. Doesn't hurt to find out though.
 
  #29  
Old 09-30-2008, 11:26 PM
Registered User
iTrader: (5)
Join Date: Sep 2006
Location: torrance
Posts: 6,285
Received 10 Likes on 9 Posts
hey dave,

i just found this thread as another member turned me onto this option. would love to hear some sound clips as this would be the last bit of exhaust modification i would consider doing. my set up is quite loud as is so not sure if i would be shooting myself in the foot by doing this. great find, tho!

keep us posted.
 
  #30  
Old 10-01-2008, 01:39 AM
Registered User
iTrader: (6)
Join Date: Jul 2008
Location: Indianapolis, IN
Posts: 141
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by DaveB
Will do as soon as I find some time. My daughter was born on Friday and I've been a busy man for the past few days.

Congratulations on the new daughter!! My daughter just turned 3 Monday. You are in for some great times, bro.DOMO
 

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: 350Z HR Y-pipe installed on a 2003 G35


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: