[Sirrotica]

You can make your own, if you can weld exhaust pipe, but anyone selling one could be liable for a rather hefty fine. Right now the EPA has cracked down hard on the Diesel Brothers, and some other guys that have You Tube channels for modifying their emissions systems. I think the Diesel Brothers were fined $850,000.

I had a friend that owned a Midas franchise, and used to make them up, but the threat of the EPA busting anyone making test pipes scared him away from continuing to make them. This was in the 80s, not recently. This was the time the test tubes went away, and disappeared.

The other avenue is to change the early 2 hole flange on pre 74 headpipes to a 3 hole flange so they can be bolted to the later manifolds, then retrofit an early dual system to the later chassis.

The old convertor can be gutted, and empty the pellets out too. You have to be able to weld the plug back in though. I've probably known of these ways around the catalyst since the 70s, I would never do them though.....

[72projectbird]

Originally Posted by Sirrotica

You can make your own, if you can weld exhaust pipe, but anyone selling one could be liable for a rather hefty fine. Right now the EPA has cracked down hard on the Diesel Brothers, and some other guys that have You Tube channels for modifying their emissions systems. I think the Diesel Brothers were fined $850,000.

I had a friend that owned a Midas franchise, and used to make them up, but the threat of the EPA busting anyone making test pipes scared him away from continuing to make them. This was in the 80s, not recently. This was the time the test tubes went away, and disappeared.

The other avenue is to change the early 2 hole flange on pre 74 headpipes to a 3 hole flange so they can be bolted to the later manifolds, then retrofit an early dual system to the later chassis.

The old convertor can be gutted, and empty the pellets out too. You have to be able to weld the plug back in though. I've probably known of these ways around the catalyst since the 70s, I would never do them though.....

I can make one, but figured I'd see if anyone had one first. I've gutted plenty of modern cats, but never a pellet style. How bad are they to gut?

[Sirrotica]

I've heard that, once you remove the plug, the pellets can be taken out, then there is a baffle under the plug that can be reached with a air chisel, or cutting torch to punch a hole through it to allow better flow. That baffle is used to redirect exhaust flow. Then you need to straighten the plug out, and weld it back in to the body. It looks legal, but nothing in there to obstruct flow.

I've heard this, never have done it, of course, because of the legal ramifications....

[72projectbird]

Originally Posted by Sirrotica

I've heard that, once you remove the plug, the pellets can be taken out, then there is a baffle under the plug that can be reached with a air chisel, or cutting torch to punch a hole through it to allow better flow. That baffle is used to redirect exhaust flow. Then you need to straighten the plug out, and weld it back in to the body. It looks legal, but nothing in there to obstruct flow.

I've heard this, never have done it, of course, because of the legal ramifications....

Ahh but of course, we're simply discussing semantics.

I'll investigate it tomorrow and see what I come up with.