calling exhaust experts- current setup TOO LOUD and a little blatty - Rennlist - Porsche Discussion Forums

Go Back  Rennlist - Porsche Discussion Forums > Water Cooled Technical Discussion Areas > 997 Forum
Reload this Page >

calling exhaust experts- current setup TOO LOUD and a little blatty

997 Forum
Sponsored by:
Sponsored by:

calling exhaust experts- current setup TOO LOUD and a little blatty

Old 03-15-2019, 02:03 PM
Thread Starter
911Consultant's Avatar
Join Date: Feb 2019
Posts: 22
Default calling exhaust experts- current setup TOO LOUD and a little blatty

So after buying my 2005 Carrera, i wasn't in love with the sound, it was meh to me with windows up. Windows up its kinda blatty and loud. Getting under the car the last few days clarifies what I have which is NHP headers, race pipe (no cats) and Agency power cans with OEM 3.6 lyr tips. My dissatisfaction is both the sound and volume. If it sounded exotic but loud that is ok but it just sounds bad to me.
The question is what would be the first step to dial back the volume and potentially improve the sound from the forum? replace race pipe with -------? Change the tips to dual tips? HELP!
911Consultant is offline  
Old 03-15-2019, 02:32 PM
[email protected]
Basic Sponsor
Site Sponsor

Phil@Fabspeed's Avatar
Join Date: Nov 2006
Location: Fort Washington, Pa
Posts: 4,584

Phil from Fabspeed here.
Adding cats in an x-pipe would really improve the sound. I would quiet it down a little and give you a deeper throatier sound.
Phillip Janssen
Porsche Performance Specialist
[email protected]

Fabspeed Motorsport USA
155 Commerce Drive Fort Washington, PA 19034

Ultimate quality T304L Stainless Steel Exhaust Systems, Carbon Fiber Air Intakes and ECU Tuning for Exotic Cars
Phil@Fabspeed is offline  
Old 03-16-2019, 04:11 AM
Milo2361's Avatar
Join Date: Jan 2017
Location: Emerald Isle, NC
Posts: 46

I'm definitely not an expert, but I do love the way mine sounds. I've got Borla headers(discontinued), AWE cats (crossover type, no X-Pipe) and Borla mufflers(discontinued). In my opinion it sounds amazing, not terribly loud putting around town, but when you get on it, it really opens up nicely. The only downside is that it drones a bit above 75Mph - Personally I can look past the drone because it sounds so darn awesome otherwise, and it doesn't bother my artillery deafened ears anyway.

This thread has a lot of different things going on in it - only thread I've found with different exhaust sounds for a 997.
my posts are #26 and #30. lots of examples there!
Milo2361 is offline  
Old 03-16-2019, 05:44 AM
Join Date: Nov 2013
Posts: 265

Phil is right, and an expert. Add some cats.
cwheeler is offline  
Old 03-16-2019, 08:33 AM
Rennlist Member
Petza914's Avatar
Join Date: Oct 2007
Location: Clemson, SC
Posts: 9,934

Yep, I agree.

The NHP header design is actually pretty good. I assume the mufflers are decent. What you're missing are the cats, and the X-cat design has advantages over the crossover cats.

Get the 200 cell versions and I think you'll be where you want to. I have them on my 997 along with the rest of a Fabspeed system and am very happy with the sound - exotic and not "blatty" at all.

The tips don't effect the sound much, if at all.

Petza914 is offline  

Thread Tools
Search this Thread

Contact Us About Us 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 and affiliated sites.
  • Ask a Question
    Get answers from community experts
Question Title:
Your question will be posted in: