Notices
GT S197 General Discussion This section is for technical discussions pertaining specifically to the V8 variation of the 2005 and newer Ford Mustang.

Catback advice

Old 02-11-2019, 08:00 AM
  #1  
junksecret
Thread Starter
 
junksecret's Avatar
 
Join Date: Jan 2018
Location: California
Posts: 9
Default Catback advice

I just picked up a 2010 GT that has an existing cat back modified exhaust. I don't know what brand It is, but it is LOUD. I don't mind the volume much, although I wouldn't mind not making quite so many enemies in my neighborhood, but the bigger problem is a very loud drone when cruising at some lower RPMs that actually makes conversations and radio difficult. I'm wondering if there is a solution other than replacing the entire cat back, and if not can anyone suggest a tamer cat back that won't cost me a ton of cash?

Thanks in advance for any advice
junksecret is offline  
Old 02-11-2019, 08:49 AM
  #2  
Dino Dino Bambino
3rd Gear Member
 
Dino Dino Bambino's Avatar
 
Join Date: Oct 2014
Location: Cyprus (EU)
Posts: 833
Default

Does the car still have the stock cats?
If you can get a photo of the mufflers we might be able to identify them.
Dino Dino Bambino is online now  
Old 02-11-2019, 09:06 AM
  #3  
proeagles
3rd Gear Member
 
Join Date: Dec 2008
Location: LA
Posts: 903
Default

The biggest problem with cat back exhaust is that it replaces your resonators which reduce drone and tame the sound. Your best solution is to have a muffler shop install a couple of resonators just behind the x-pipe.
proeagles is offline  
Old 02-11-2019, 10:11 AM
  #4  
junksecret
Thread Starter
 
junksecret's Avatar
 
Join Date: Jan 2018
Location: California
Posts: 9
Default

Yes, still has stock Cats....
junksecret is offline  
Old 02-11-2019, 10:14 AM
  #5  
junksecret
Thread Starter
 
junksecret's Avatar
 
Join Date: Jan 2018
Location: California
Posts: 9
Default

I'll try and get a photo up soon, I just picked up the car yesterday, havent even got it on a lift yet,but getting tires tomorrow, so should be able to get decent pics then, thx!
junksecret is offline  
Old 02-11-2019, 11:03 AM
  #6  
Dino Dino Bambino
3rd Gear Member
 
Dino Dino Bambino's Avatar
 
Join Date: Oct 2014
Location: Cyprus (EU)
Posts: 833
Default

Originally Posted by proeagles View Post
The biggest problem with cat back exhaust is that it replaces your resonators which reduce drone and tame the sound. Your best solution is to have a muffler shop install a couple of resonators just behind the x-pipe.
The 10 GT didn't come with resonators. Just a catted H-pipe and catbacks with chambered mufflers. The OP's car probably has straight--through mufflers and those tend to drone in the 1500-2000rpm range.
Dino Dino Bambino is online now  
Old 02-12-2019, 12:37 AM
  #7  
junksecret
Thread Starter
 
junksecret's Avatar
 
Join Date: Jan 2018
Location: California
Posts: 9
Default

Thx!

I'm hoping to get it up in the air in the next cpl of days and I'll post some pics. I had my initial shakedown drive today and several more issues seemed to surface, so I'm subject to ask for more advice as my 1st Mustang ownership experience evolves.
junksecret is offline  
Old 02-12-2019, 11:09 PM
  #8  
junksecret
Thread Starter
 
junksecret's Avatar
 
Join Date: Jan 2018
Location: California
Posts: 9
Default

Originally Posted by Dino Dino Bambino View Post
The 10 GT didn't come with resonators. Just a catted H-pipe and catbacks with chambered mufflers. The OP's car probably has straight--through mufflers and those tend to drone in the 1500-2000rpm range.
Thanks Dino,

I didn't get it up in the air but I had a muffler shop take a look and he confirmed cats are there, H-pipe and straight through mufflers. He suggested switching to an X-pipe and magnaflow chambered mufflers as you suggested. I may get it done tomorrow, I'll keep you posted.




junksecret is offline  
Old 02-15-2019, 01:09 PM
  #9  
Derf00
6th Gear Member
 
Join Date: Feb 2005
Location: AZ
Posts: 11,627
Default

X pipe also changes the tone of the exhaust.

X is typically the angry bumble bee buzzing sounding (Think Nissan G series at WOT) vs H which is more a car growl (muscle car). It has to do with the firing order, the way the sound waves bounce off each other in the exhaust system, and the air flow characteristics of the crossover itself.

If you have a drone, the best way to address it is by changing the mufflers. Keep in mind most aftermarket systems will drone, just at different RPMs. That's the price you pay for volume and sound.
Derf00 is offline  
Old 02-15-2019, 05:17 PM
  #10  
Dino Dino Bambino
3rd Gear Member
 
Dino Dino Bambino's Avatar
 
Join Date: Oct 2014
Location: Cyprus (EU)
Posts: 833
Default

Originally Posted by Derf00 View Post
X pipe also changes the tone of the exhaust.

X is typically the angry bumble bee buzzing sounding (Think Nissan G series at WOT) vs H which is more a car growl (muscle car).
It depends on which mufflers you have as well. I have the FRPP X-pipe and the car still has the same growl with no rasp whatsoever. Mufflers are from an 07-09 GT500.
Dino Dino Bambino is online now  

Thread Tools
Search this Thread
Quick Reply: Catback advice


Advertising
Featured Sponsors
Vendor Directory

Contact Us - 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.