modify OEM exhaust

Jimbo370 · 01-19-2017, 02:02 PM

Has anyone tried to take the honeycomb out of the exhaust or put bigger tailpipes (AAM) on OEM? I have heard of the washer trick(no thanks). Just changed out the HFC and the noise improved above 3000rpm. Would changing from Y to H pipe be worth more noise and HP? Maybe thicker mid piping? Anybody tried some these mods with the OEM or is it just junk. Just asking

2011 Nismo#91 · 01-19-2017, 02:27 PM

Played around with the exaust today. Some general thoughts

Most restrictive parts of the exhaust:
#1 Cat
#2 Y-pip
#3 Muffler

OEM is almost junk, if you can grab a used nismo exhaust locally for a hundred that might be worth it but not really.

Ventruck · 01-24-2017, 12:54 AM

Nismo exhaust is only worth it if you DIY to save every penny.

Since my car is a daily and I live in CA, I did get the newer version to live on the safe side. It was either that or the Stillen that hangs low and costs more (despite potential gains). I've read some people claim it gets quiet near idle, and that was the case for me also, but I also had a Ecutek tune in play dedicated to the setup before the swap. Re-tune has it sounding better. Net gains over before I did the swap are kinda felt, but it's nothing amazing. I just did it because I'm trying to go as far as I can within my own bounds.

Mods otherwise are kinda wasteful and/or ghetto. Just put the money to a proper system. End of the day that's going to be what you wish you did if you tried to shortcut somewhere.

mattross1313 · 01-24-2017, 06:42 AM

I was going to post up a similar question soon so this thread has good timing.

I am the very proud owner of a new MY17 Nismo. The car is great (incredible) but the exhaust leaves a little to be desired, especially coming from my '09 370 with ARK Grip system.

This weekend I installed the ART Test Pipes and sound is improving. The car only covered around 230 miles, so would I be right in saying that once the current Nismo system has had chance to bed in it will sound better?

I don't really want to remove the Nismo system as it all adds to the charm of the car. But I could do with some more noise. So I had thought about getting a different Y pipe, but leaving the Nismo muffler on? Anyone achieved similar?

lj909 · 01-24-2017, 09:36 AM

The nismo has larger H pipe mid assembly and will get you some gains over the standard Y pipe.

As far as sound goes, the muffler is really quiet, nismo or standard

SS_Firehawk · 01-24-2017, 12:03 PM

The Nismo exhaust is outstanding for a cheap power upgrade. Add short tails or an axleback and you'll get 90% of the power as a dual 2.5 cat back. Nismo exhausts average 3-400, not $100. It's worth it for that price. You can buy a knockoff exhaust, but at least you know it's oem quality

01-19-2017, 02:02 PM	#1 (permalink)
Jimbo370 Enthusiast Member Join Date: Jan 2014 Location: Florida Posts: 466 Drives: 09 black 370z MT Rep Power: 11	modify OEM exhaust Has anyone tried to take the honeycomb out of the exhaust or put bigger tailpipes (AAM) on OEM? I have heard of the washer trick(no thanks). Just changed out the HFC and the noise improved above 3000rpm. Would changing from Y to H pipe be worth more noise and HP? Maybe thicker mid piping? Anybody tried some these mods with the OEM or is it just junk. Just asking

01-19-2017, 02:27 PM	#2 (permalink)
2011 Nismo#91 A True Z Fanatic Join Date: Mar 2011 Location: NJ Posts: 2,381 Drives: slowly Rep Power: 33858	Played around with the exaust today. Some general thoughts Most restrictive parts of the exhaust: #1 Cat #2 Y-pip #3 Muffler OEM is almost junk, if you can grab a used nismo exhaust locally for a hundred that might be worth it but not really. Jimbo370 likes this. __________________ GTR TT 493Whp/431lbft, Ecutek, Southbend 6puck,Quaife, RPM RollBar 4Point, R888R, JRZ RSPro F(10R/10C) R(10R/6C) 1000f500r inlbs+150inlbs Tender, SPL everywhere.Full Specs Last edited by 2011 Nismo#91; 01-19-2017 at 02:42 PM.

01-24-2017, 09:36 AM	#5 (permalink)
lj909 Track Member Join Date: May 2014 Location: Riverside Posts: 584 Drives: 40th 370Z Rep Power: 11	The nismo has larger H pipe mid assembly and will get you some gains over the standard Y pipe. As far as sound goes, the muffler is really quiet, nismo or standard __________________ PW 07 HR350Z R.I.P. Totaled by 82yr old woman 2010 40th Anniversary 370Z

01-24-2017, 12:03 PM	#6 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7334	The Nismo exhaust is outstanding for a cheap power upgrade. Add short tails or an axleback and you'll get 90% of the power as a dual 2.5 cat back. Nismo exhausts average 3-400, not $100. It's worth it for that price. You can buy a knockoff exhaust, but at least you know it's oem quality __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction

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01-24-2017, 12:54 AM	#3 (permalink)
Ventruck Track Member Join Date: Jun 2016 Location: California Posts: 782 Drives: '13 Sport+Touring M6 Rep Power: 22897	Nismo exhaust is only worth it if you DIY to save every penny. Since my car is a daily and I live in CA, I did get the newer version to live on the safe side. It was either that or the Stillen that hangs low and costs more (despite potential gains). I've read some people claim it gets quiet near idle, and that was the case for me also, but I also had a Ecutek tune in play dedicated to the setup before the swap. Re-tune has it sounding better. Net gains over before I did the swap are kinda felt, but it's nothing amazing. I just did it because I'm trying to go as far as I can within my own bounds. Mods otherwise are kinda wasteful and/or ghetto. Just put the money to a proper system. End of the day that's going to be what you wish you did if you tried to shortcut somewhere.

01-24-2017, 06:42 AM	#4 (permalink)
mattross1313 Base Member Join Date: Nov 2016 Location: UK Posts: 71 Drives: 2017 Nismo Rep Power: 196	I was going to post up a similar question soon so this thread has good timing. I am the very proud owner of a new MY17 Nismo. The car is great (incredible) but the exhaust leaves a little to be desired, especially coming from my '09 370 with ARK Grip system. This weekend I installed the ART Test Pipes and sound is improving. The car only covered around 230 miles, so would I be right in saying that once the current Nismo system has had chance to bed in it will sound better? I don't really want to remove the Nismo system as it all adds to the charm of the car. But I could do with some more noise. So I had thought about getting a different Y pipe, but leaving the Nismo muffler on? Anyone achieved similar?