I used them on a B-Stock car. I would like to say they would be great, but I really don’t know how much spring they can handle without a revalve. They are a larger diameter than the sports, and have a larger piston, so without a doubt I can say they are better than the OTS sports (80 series).
These have been rebuild by pro parts with a little more low speed rebound in the rear a few years ago. The only bad thing about them is the rears clunk, mostly when cold but still make a little noise when warm. This seems to be normal with this shock. They made the noise before and after the rebuild. Almost everybody that has them says they make noise.
I replaced them with AST’s 5200 that I got a very good deal on. So I would say they are a step above the Koni sports and a step below DA AST’s.