Jamies Track built GTi 6 (new replacement purchased!)

[Ed Doe]

^^ Ben, they make the rear end a lot more predictable when it let's go, but the sacrifice is a reduction in sharpness of turn-in, which in my opinion is one of the reasons the 306 feels so much fun to drive.

It's a trade-off though, if you're building an ultimate go-fast track weapon, then the solid rear beam mounts will be better, as they will be more suited to ultimately getting the most grip through corners, and I'm sure adjusting the camber/caster/toe at the front coupled with a reduction in toe-in if you get the right rear beam can give you the sharpness back. Personally though, I'd stick with good OEM mounts if you're using it as a fast-road/occasional track car though...