My stock muffler vs ZHP

2003 325i · 01-14-2011, 12:56 PM

What's the difference? Is there one? Inlet/outlet size and #? Flow? Sound?

I'm considering it. Any info would be helpful.

Steven747 · 01-14-2011, 01:37 PM

please research you are going to get flammed for this!

yes im prety sure the piping is different but not 100% actually i believe 325 and 330 are the same but cant confirm please search there are over 50 threads on this

BusaNoob · 01-14-2011, 01:38 PM

Look in you outlet and see if you have a flappy deal like this:

Zhp mufflers dont have this and they have a lower rumble to them.
Zhps are also dual in / dual out. If you have a single in, any decent muffler shop should be able to fit a y-pipe for you.

You are in luck actually because I have one for sale off my car !

Jim Murphy · 01-14-2011, 01:58 PM

+1
And don't forget to plug the vacuum line going to this "flappy" valve after you install the ZHP muffler.

Jim

Steven747 · 01-14-2011, 03:23 PM

Quote:

Originally Posted by BusaNoob

Look in you outlet and see if you have a flappy deal like this:

Zhp mufflers dont have this and they have a lower rumble to them.
Zhps are also dual in / dual out. If you have a single in, any decent muffler shop should be able to fit a y-pipe for you.

You are in luck actually because I have one for sale off my car !

damm thats a nasty left pipe you got there id love to pick that stuff out

BusaNoob · 01-14-2011, 03:28 PM

Thats not mine, I just used that pic to show the flap.

This is mine:

Nando779 · 01-14-2011, 04:58 PM

Good deal, I hear the ZHP exhaust is basically the BMW Performance exhaust. PM sent to seller.

01-14-2011, 12:56 PM	#1
2003 325i Registered User Join Date: Mar 2009 Location: New Hamburg, Ontario, Canada Posts: 1,456 My Ride: '03 Orient Blue 325i View My Garage	My stock muffler vs ZHP What's the difference? Is there one? Inlet/outlet size and #? Flow? Sound? I'm considering it. Any info would be helpful.

01-14-2011, 01:38 PM	#3
BusaNoob Registered User Join Date: Aug 2008 Location: here Posts: 543 My Ride: AW 06 330ci ZHP View My Garage	Look in you outlet and see if you have a flappy deal like this: Zhp mufflers dont have this and they have a lower rumble to them. Zhps are also dual in / dual out. If you have a single in, any decent muffler shop should be able to fit a y-pipe for you. You are in luck actually because I have one for sale off my car ! Last edited by BusaNoob; 01-14-2011 at 01:40 PM.

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01-14-2011, 01:37 PM	#2
Steven747 OEM ///Member Join Date: Aug 2010 Location: Orange County, CA Posts: 4,164 My Ride: 05 330ci View My Garage	please research you are going to get flammed for this! yes im prety sure the piping is different but not 100% actually i believe 325 and 330 are the same but cant confirm please search there are over 50 threads on this

01-14-2011, 01:58 PM	#4
Jim Murphy Registered User Join Date: Mar 2009 Location: Atlanta (Dunwoody), GA Posts: 452 My Ride: 2006 E46 330Ci ZHP View My Garage	+1 And don't forget to plug the vacuum line going to this "flappy" valve after you install the ZHP muffler. Jim

01-14-2011, 03:28 PM	#6
BusaNoob Registered User Join Date: Aug 2008 Location: here Posts: 543 My Ride: AW 06 330ci ZHP View My Garage	Thats not mine, I just used that pic to show the flap. This is mine:

01-14-2011, 04:58 PM	#7
Nando779 Registered User Join Date: Feb 2010 Location: Tucson, Az Posts: 121 My Ride: 2003 325Ci View My Garage	Good deal, I hear the ZHP exhaust is basically the BMW Performance exhaust. PM sent to seller.