So back around 1995 I bought a pair of .96 bars and used them for a few years in my Satellite with a 1.25 sway bar for a street handling car. They arrived zinc chromate green with made in Canada stickers. When I decided to take it drag racing, I put the stock .88 bars back in it and hung on to the old .96 bars. About 2004 I picked up a Challenger that was going the autocross route so I bought some 1.24 bars. Once these bars were installed I put my old .96 bars in that box and forgot about them.

So I see your question, dig up an old 2001 Mopar Performance catalog, check the t-bar table and notice P5249159 is listed for 1.0 bars. I notice the box with my old bars in the corner and pull open the end tab. Looking at the end of the bars I see 458R and 459L. Now when I bought these, they were supposed to be .96 bars, but I never verified that, I just slid them in and that was that. So I grab my mic and check them and sure a [censored], they are 1.0 bars. There is still the paper wrap label on them and I can barely make out the "Made In Canada" text, but its there. Unfortunately, the part numbers are so dirty and worn I can't make those out.

So, for 27 years I thought these were something different. Hmm, go figure.

I have an old DC Kit Car catalog, so I checked it to see what part numbers are in there. Unfortunately the starting size in that program was 1.06 and its part number is P2948783. Looking on one of my older DC Chassis Manuals, no luck there. Since they tend to be drag race focused, they don't include larger bar numbers.

In any case, they install just like a stock t-bar. Nothing special required.