C6 Tech/Performance LS2, LS3, LS7, LS9 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

Adding Cats?

Thread Tools
 
Search this Thread
 
Old Nov 20, 2022 | 02:15 PM
  #1  
farmington's Avatar
farmington
Thread Starter
Safety Car
 
Joined: Aug 2017
Posts: 4,243
Likes: 1,133
From: North Myrtle Beach SC
Default Adding Cats?

Did small cam (btr 1 v2) along with headers and off road midpipe. The exhaust smell isn’t a huge deal, but it’s annoying occasionally. Thinking about adding cats. Seeing 200/sq in and 400/sq in. The 200’s were recommended for high performance. Anybody know if the less dense (200) will clean up the smell? Any other suggestions or tips?
Reply
Old Nov 20, 2022 | 09:17 PM
  #2  
bwill03z's Avatar
bwill03z
Melting Slicks
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Nov 2011
Posts: 3,161
Likes: 257
From: Virginia
Default

Yes they will. My C5 Z06 was cammed with long tubes and I added Magnaflow universal 200 cell count cats to my X pipe and it cleaned up the smell nicely, wasnt bad at all after that.
Reply
Old Nov 20, 2022 | 09:47 PM
  #3  
DrKrieger's Avatar
DrKrieger
Drifting
Conversation Starter
All Eyes On Me
Photoriffic
Shutterbug
 
Joined: Apr 2021
Posts: 1,928
Likes: 1,125
From: Peoria, AZ
2023 C6 of the Year Finalist - Modified
Default

I have an A & A S/C with Belanger Custom Tri-Y Headers, and Magna Flow High Flow Cats (53956). Very clean, and passes smog test in Metro Phoenix, Arizona.
Reply
Old Nov 26, 2022 | 01:50 PM
  #4  
farmington's Avatar
farmington
Thread Starter
Safety Car
 
Joined: Aug 2017
Posts: 4,243
Likes: 1,133
From: North Myrtle Beach SC
Default

FedEx guy just dropped off my cats. Back to work.
Reply
Old Nov 26, 2022 | 04:34 PM
  #5  
Dano523's Avatar
Dano523
Race Director
10 Year Member
Community Builder
Community Influencer
Top Answer: 1
 
Joined: Dec 2013
Posts: 12,500
Likes: 3,625
Default

Leave at at least 4" from the end of the collector spike, to the start of the cat combs (inside the end pipe where the collectors spike end in the pipe, to the start of the combs in the cats.

This will be enough room/volume to not disturb the Benelli effect of the header collectors.
Reply
Old Nov 26, 2022 | 05:55 PM
  #6  
HOXXOH's Avatar
HOXXOH
Race Director
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2007
Posts: 16,557
Likes: 2,104
From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
Default

You can tune out most of the smell, by leaning the mixture at idle and reducing the idle rpm.
Reply

Get notified of new replies

To Adding Cats?





All times are GMT -4. The time now is 08:37 AM.

story-0
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-1
2027 Corvette vs The World: Every Model vs Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-20 17:58:41


VIEW MORE
story-2
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE
story-3
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE
story-4
2027 Corvette Buyer's Guide: Everything You Need to Know!

Slideshow: 2027 Corvette buyer's guide

By Joe Kucinski | 2026-04-17 16:41:08


VIEW MORE
story-5
10 Things C8 Corvette Owners Hate (But Won't Tell You)

Slideshow: 10 things C8 Corvette owners hate, but won't tell you.

By Joe Kucinski | 2026-04-01 18:36:07


VIEW MORE
story-6
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

Slideshow: Should you add one of these incredible Corvettes to your garage?

By Brett Foote | 2026-04-01 18:14:05


VIEW MORE
story-7
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

Slideshow: Every Corvette Grand Sport explained

By Joe Kucinski | 2026-03-26 07:13:44


VIEW MORE
story-8
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

Slideshow: Breaking down the 2027 Grand Sport, Grand Sport X, Stingray, and LS6 V8.

By Michael S. Palmer | 2026-03-26 13:48:45


VIEW MORE
story-9
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

Slideshow: 5 reasons bad drivers crash sports cars & 5 ways to avoid a costly shame!

By Joe Kucinski | 2026-03-25 16:32:55


VIEW MORE