C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

Installing catalytic converter

Thread Tools
 
Search this Thread
 
Old Apr 13, 2011 | 09:33 AM
  #1  
janmn's Avatar
janmn
Thread Starter
Intermediate
10 Year Member
 
Joined: Sep 2010
Posts: 34
Likes: 1
From: Karup J
Default Installing catalytic converter

Unfortunately I did not do the research well enough before buying my 1976 Corvette. I was so happy that the previous owner had installed a completely new exhaust system, that I did not even notice, that the exhaust system was a dual exhaust without the catalytic converter. I am not concerned about originality, but I will move to a country with very strict emission standards, so I am concerned they will require the catalytic converter. So my question is: Can I install an aftermarket/third party catalytic converter to the exhaust system, or do I have to buy a completely new original Y-pipe system? I am grateful for any advice.
Reply
Old Apr 13, 2011 | 09:38 AM
  #2  
bashcraft's Avatar
bashcraft
Le Mans Master
20 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
 
Joined: Jan 2006
Posts: 6,504
Likes: 138
From: Butler Pa
Default

Depends on the laws in the country you'll be moving to.
Reply
Old Apr 13, 2011 | 10:37 AM
  #3  
janmn's Avatar
janmn
Thread Starter
Intermediate
10 Year Member
 
Joined: Sep 2010
Posts: 34
Likes: 1
From: Karup J
Default

Thanks for the reply Bashcraft. It made me realize that I need to be more specific. The question does not go towards legal issues. What I mean is: Is it at all technical possible to retrofit a dual exhaust system with a catalytic converter? If so do I just take out the appropriate piece of the current pipes and replace them with a converter? Do anybody know of third party converters for this purpose?
Reply
Old Apr 13, 2011 | 10:49 AM
  #4  
bashcraft's Avatar
bashcraft
Le Mans Master
20 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
 
Joined: Jan 2006
Posts: 6,504
Likes: 138
From: Butler Pa
Default

Yes, you can buy high flow converters in many different configurations, but they may have a law that says you must use the OEM configuration, which is one converter only, not one on each side.
Reply
Old Apr 13, 2011 | 10:55 AM
  #5  
janmn's Avatar
janmn
Thread Starter
Intermediate
10 Year Member
 
Joined: Sep 2010
Posts: 34
Likes: 1
From: Karup J
Default

Thanks again. I don't think OEM is a requirement, as it will be registered as vintage. So I will take my chances with the third party. Is there any particular that you would recommend?
Reply
Old Apr 13, 2011 | 10:57 AM
  #6  
bashcraft's Avatar
bashcraft
Le Mans Master
20 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
 
Joined: Jan 2006
Posts: 6,504
Likes: 138
From: Butler Pa
Default

No, my car is a '69 so I never had to bother with them. You might want to check out what Summit has.
Reply
Old Apr 13, 2011 | 11:02 AM
  #7  
Paul L's Avatar
Paul L
Team Owner
15 Year Member
 
Joined: Aug 1999
Posts: 30,995
Likes: 98
From: Ontario
Default

Originally Posted by janmn
Thanks for the reply Bashcraft. It made me realize that I need to be more specific. The question does not go towards legal issues. What I mean is: Is it at all technical possible to retrofit a dual exhaust system with a catalytic converter? If so do I just take out the appropriate piece of the current pipes and replace them with a converter? Do anybody know of third party converters for this purpose?
You'll need the front and rear Y-pipes with the catalytic converter (one) on the passenger side. The high-flow honeycomb type is much better and freer-flowing than the original pellet type and is legal. Retrofit with two cat cons on a dual exhaust system is not "factory" and may not be legal. A check with the county people with strict standards is your first step. There ARE legal issues both for you and any shop you ask to do the job.
Reply
Old Apr 13, 2011 | 12:59 PM
  #8  
Chromie69's Avatar
Chromie69
Racer
 
Joined: Jan 2011
Posts: 266
Likes: 0
From: York Pa.
Default

I looked in the pa emissions book..here as long as there is a cat present hollow or not it passes..we are completely visual in most of the state..nothing in there about it having to be completely stock..so I would go into an emissions test shop and ask for a copy of the inspection procedure..it will have word for word of what they are supposed to be checking..also cars here before 1976 are not tested in any way for emissions ..so be calm about it and do whatever you can to make it appear to be legal..lol..just kidding..if there is an exhaust shop around you that does the emissions test have them install the cats and plop a sticker on it also..then you are off the hook..
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

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

 Joe Kucinski
story-1

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

 Verdad Gallardo
story-2

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-3

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

 Michael S. Palmer
story-4

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

 Joe Kucinski
story-5

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

 Michael S. Palmer
story-6

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

 Joe Kucinski
story-7

10 Most Common Corvette Problems of the Last 20 Years!

 Joe Kucinski
story-8

5 MOST and 5 LEAST Popular Corvette Model Years in History!

 Joe Kucinski
story-9

2027 Corvette Buyer's Guide: Everything You Need to Know!

 Joe Kucinski
Old Apr 13, 2011 | 01:12 PM
  #9  
bashcraft's Avatar
bashcraft
Le Mans Master
20 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
 
Joined: Jan 2006
Posts: 6,504
Likes: 138
From: Butler Pa
Default

Originally Posted by Chromie69
I looked in the pa emissions book..here as long as there is a cat present hollow or not it passes..we are completely visual in most of the state..nothing in there about it having to be completely stock..so I would go into an emissions test shop and ask for a copy of the inspection procedure..it will have word for word of what they are supposed to be checking..also cars here before 1976 are not tested in any way for emissions ..so be calm about it and do whatever you can to make it appear to be legal..lol..just kidding..if there is an exhaust shop around you that does the emissions test have them install the cats and plop a sticker on it also..then you are off the hook..
That would be great if he lived in Pa.
Reply
Old Apr 13, 2011 | 01:32 PM
  #10  
Chromie69's Avatar
Chromie69
Racer
 
Joined: Jan 2011
Posts: 266
Likes: 0
From: York Pa.
Default

Yeah it would be great if he lived here like us..then he wouldn't have to deal with any of it!
Reply
Old Apr 14, 2011 | 12:52 AM
  #11  
Gale Banks 80''s Avatar
Gale Banks 80'
Safety Car
15 Year Member
Photogenic
Photoriffic
Top Answer: 1
 
Joined: Nov 2008
Posts: 3,713
Likes: 550
From: Seattle Washington
Default

I wouldn't try to guess what the Country is going to want You need to find out. In Washington State any Car over 25 years old dosn't have emissions anymore. ( there is less money to be made on Cars that don't pass, they are time consumeing and they want to run as many Cars as they can at $16 each) In contrast in Japan You can't change anything if the Engine blows up the car is Totaled. I'd put Duel Cats on it , but You need to find out what they want first.
Reply
Old Apr 14, 2011 | 04:03 AM
  #12  
dgood's Avatar
dgood
Burning Brakes
 
Joined: Apr 2009
Posts: 807
Likes: 2
From: VIRGINIA BEACH VIRGINIA
Default

Jan,
give this thread some time. There are people on the forum here that are from all different countries. Let us know what country you are moving to and someone will chime in with what is required.

Dan
Reply
Old Apr 14, 2011 | 07:47 AM
  #13  
janmn's Avatar
janmn
Thread Starter
Intermediate
10 Year Member
 
Joined: Sep 2010
Posts: 34
Likes: 1
From: Karup J
Default

Thanks for all the good inputs. The car will be going to Denmark, where it will be registered as vintage.
Reply
Old Apr 14, 2011 | 07:53 AM
  #14  
bashcraft's Avatar
bashcraft
Le Mans Master
20 Year Member
Active Streak: 30 Days
Active Streak: 60 Days
 
Joined: Jan 2006
Posts: 6,504
Likes: 138
From: Butler Pa
Default

http://forums.corvetteforum.com/c3-g...b-denmark.html
Reply

Get notified of new replies

To Installing catalytic converter





All times are GMT -4. The time now is 08:06 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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