Link or specs for Exhaust Flanges?

[CharlieS]

I'm replacing my '94 exhaust with a '95-97 style from the manifolds back, but only one cat (and that is attached to the downpipe).

I have the parts in hand except I need to weld up a spacer to replace the second cat. To make a spacer I need to grab some tubing (2-1/4"?) and two flanges.

Anyone know the specs for the flanges so I can either order them online or buy them local? Links would be great, but knowing the specs would allow me to search.

 

[NKP Garage]

have used the Fortluft flanges on several projects and they're hard to beat for the price. They have sizes to fit all the various flange sizes on the LC exhaust: https://www.amazon.com/FORTLUFT-Exhaust-Flange-Connection-63-5mm/dp/B082MKNVWT?tag=ihco-20

 

[jonheld]

I have the parts in hand except I need to weld up a spacer to replace the second cat.

With a single cat you can go over the frame to the muffler. This clears out the entire passenger side with nothing under the frame.

 

[baldilocks]

With a single cat you can go over the frame to the muffler. This clears out the entire passenger side with nothing under the frame.

View attachment 3431081

I will be addressing this issue in coming months as I build my first OBD2 80 series. I’ve read about aftermarket cats and down pipes but this photo appears to show a single oem cat. Am I correct? Could I simply reduce to a single oem cat, assuming it’s still a good unit, and enjoy the same results?

That O2 sensor is quite a distance aft of the cat…..

 

[jonheld]

I will be addressing this issue in coming months as I build my first OBD2 80 series. I’ve read about aftermarket cats and down pipes but this photo appears to show a single oem cat. Am I correct? Could I simply reduce to a single oem cat, assuming it’s still a good unit, and enjoy the same results?

That O2 sense or is quite a distance att of the cat…..

That is the Magnaflow downpipe/cat. I went to a local hot rod shop with the Magnaflow and a box of parts from Bosal. They cut apart what was needed, welded up all the O2 bungs, etc. The Bosal muffler had a slightly smaller diameter than OEM so that too was tucked up higher.
No issues at all, other than it's starting to rust out. But it's been about 5 or 6 years.