C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

does cat size matter??

Thread Tools
 
Search this Thread
 
Old Apr 8, 2009 | 05:04 AM
  #1  
Qiken's Avatar
Qiken
Thread Starter
Racer
 
Joined: Sep 2005
Posts: 449
Likes: 1
From: Victoria
Default does cat size matter??

Deciding to replace the original cat in my 89 with an aftermarket,do they all serve the same purpose regardless of their size ,as even the aftemarket offerings seem to vary greatly in design....
In other words does size really matter
Reply
Old Apr 8, 2009 | 07:24 AM
  #2  
frenchyoliver's Avatar
frenchyoliver
Drifting
10 Year Member
 
Joined: Aug 2006
Posts: 1,279
Likes: 0
From: Delray beach FL
Default

It does matter depending on main or pre cats ?
Reply
Old Apr 8, 2009 | 08:44 AM
  #3  
WW7's Avatar
WW7
Le Mans Master
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Aug 2007
Posts: 8,735
Likes: 412
From: WV
Default

Some of the aftermarket cats say they flow 23% better, I would go with a name brand with the higher flow.These can be had for around $150.00 to $180.00 .WW
Reply
Old Apr 8, 2009 | 08:53 AM
  #4  
BADDUCK's Avatar
BADDUCK
Le Mans Master
 
Joined: Jun 2006
Posts: 5,642
Likes: 5
From: One day you're a Comet...the next day you're dust... Arkansas
Default

I put on a high flow Magnaflow (Carsound) main cat. The size that matters is inlet/outlet size. Got mine on eBay for $65.00. It is the universal model.
Reply
Old Apr 8, 2009 | 09:27 AM
  #5  
jeffp1167's Avatar
jeffp1167
Safety Car
 
Joined: Oct 2008
Posts: 4,689
Likes: 4
From: Yucaipa CA
Default

do most of these aftermarket "direct fit" cats have the special air injection pipe that has the correct flare fitting so it matches the stock pipe?
Reply
Old Apr 8, 2009 | 10:09 AM
  #6  
BADDUCK's Avatar
BADDUCK
Le Mans Master
 
Joined: Jun 2006
Posts: 5,642
Likes: 5
From: One day you're a Comet...the next day you're dust... Arkansas
Default

You can get them with or without the air tube. I can't speak for all on fit.
My fitting fit the Magnaflow tube.
Reply
Old Apr 8, 2009 | 05:43 PM
  #7  
Qiken's Avatar
Qiken
Thread Starter
Racer
 
Joined: Sep 2005
Posts: 449
Likes: 1
From: Victoria
Default

Originally Posted by frenchyoliver
It does matter depending on main or pre cats ?
Main cat no precats
Reply
Old Apr 8, 2009 | 05:48 PM
  #8  
pologreen1's Avatar
pologreen1
Team Owner
15 Year Member
 
Joined: Dec 2007
Posts: 20,974
Likes: 261
Default

a real cat or a (test cat)?
meaning straight tube.

I think it matters very much it can be a restriction.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-1

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-2

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-3

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-4

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-5

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-6

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-7

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

 Michael S. Palmer
story-8

2027 Corvette vs The World: Every C8 vs Its Closest Competitor

 Joe Kucinski
story-9

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
Old Apr 9, 2009 | 07:02 AM
  #9  
Qiken's Avatar
Qiken
Thread Starter
Racer
 
Joined: Sep 2005
Posts: 449
Likes: 1
From: Victoria
Default

Originally Posted by pologreen1
a real cat or a (test cat)?
meaning straight tube.

I think it matters very much it can be a restriction.
Real Cat,I was going to gut the existing Original cat and weld a tube in however im a bit concerned this may increase resonance?as my current system already has had me found guilty by the noise police
Reply

Get notified of new replies

To does cat size matter??





All times are GMT -4. The time now is 03:12 AM.

story-0
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-1
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-2
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-3
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-4
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-5
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-6
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-7
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-8
2027 Corvette vs The World: Every C8 vs Its Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-24 16:12:42


VIEW MORE
story-9
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