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Hoping someone can tell me if the weld-on Flanges on the C8's cat's are a standard size/part ? and a good place to find them?
I'm in CA, so having Cat's shipped here is..."difficult". While I could easily figure out a way of getting them here, there's still the fact that the Kooks, LTH...etc are $1,400+ and use GESi blanks which I can buy for $400 for the Ultra High Flow models. Plus my TIG is collecting dust.
My ambition to make my own Cat’s only goes so far…lol. I would definitely make my own flanges if I had a mill, but I think having them fabbed would not end up saving anything. I’ve had some parts water jet for other projects and it isn’t cheap in Socal.
I’m pretty confident the three hole flange is standard (manifold side)...but I'm not sure about the exhaust side with 5 holes. But I think the two holes are just for the hanger, maybe this exists.
The front one has a machined groove in it for the gasket. It’s a crush gasket that sits in the groove.
That’s the hard part. The back flange is easy it can be cut with a water jet.
I will be making a complete exhaust, this winter. I have all the parts and will start fabricating next month, soon as the weather in New Jersey turns into non corvette Driving conditions.
I own my own shop with a bay and lift for the corvette. I started with making new rear bumper. Making them exit from the center. Where they look the best. This is a early pic. Since then I raised the tips up. More even with the stock pipe exit hight. I will post more after the bumper is finished
Having time and fabrication talent is one thing, but the materials are the rub (and greatest expense) when it comes to high flow catalysts. Most DIY enthusiasts won't have the ability to craft quality flanges, catalyst cores, and necessary heat insulation in the garage or workshop.
1.) Our Sport Cats use massive HJS catalysts (143mm x 115mm) - the best in the business. The quality (and physical size) of those catalysts allows us to offer our No Check Engine Light Guarantee - even though they flow 85%-90% of a straight pipe. They are far more effective than GESi offerings or other "bullet" style cats. It would be awful to go through all the effort of DIY fabrication, only to encounter a catalyst efficiency CEL in 10,000 miles, right?
2.) Our flanges are cut In-house on our water jet.
3.) Our heat blankets are military grade kevlar.
4.) Our welders are well-trained artisans - whose tig welds are both functional and visually stunning.
Similar to that completed 100 point restoration car that sells at Barrett Jackson for $80,000, despite $225,000 worth of restoration receipts - it would be very, very difficult to build a better product for less than what's already available in the retail market.
Having time and fabrication talent is one thing, but the materials are the rub (and greatest expense) when it comes to high flow catalysts. Most DIY enthusiasts won't have the ability to craft quality flanges, catalyst cores, and necessary heat insulation in the garage or workshop.
1.) Our Sport Cats use massive HJS catalysts (143mm x 115mm) - the best in the business. The quality (and physical size) of those catalysts allows us to offer our No Check Engine Light Guarantee - even though they flow 85%-90% of a straight pipe. They are far more effective than GESi offerings or other "bullet" style cats. It would be awful to go through all the effort of DIY fabrication, only to encounter a catalyst efficiency CEL in 10,000 miles, right?
2.) Our flanges are cut In-house on our water jet.
3.) Our heat blankets are military grade kevlar.
4.) Our welders are well-trained artisans - whose tig welds are both functional and visually stunning.
Similar to that completed 100 point restoration car that sells at Barrett Jackson for $80,000, despite $225,000 worth of restoration receipts - it would be very, very difficult to build a better product for less than what's already available in the retail market.
No offense meant, but how does this help if you aren't delivering your cat's to CA customers? If you sell me a pair of flanges that would be appreciated. Hopefully 40 years of welding experience with parts on most of the shuttles will allow me to do them justice. Project cars and fabricating your parts isn't usually about what you can sell it for. Case in point....current project.
No offense meant, but how does this help if you aren't delivering your cat's to CA customers? If you sell me a pair of flanges that would be appreciated. Hopefully 40 years of welding experience with parts on most of the shuttles will allow me to do them justice. Project cars and fabricating your parts isn't usually about what you can sell it for. Case in point....current project.
California is our largest market in the United States - we ship all manner of systems there daily.
I'll inquire with the Fabrication foreman to see if the flanges are available a la carte.
I suffer from the same affliction - I bought the car for less than the wheels...
Catalytic Converter Flanges
