Where can I find high performance IRS cage mounts for my 1985 XJ6? I
was surfing the net a few days ago and I thought I came
across a set of stiffer cage mounts, but now I cannot find them.

Any thoughts on this? Are all the mounts the same, or are
some better/stiffer than others? I am looking for something
more performance-oriented, but do NOT want to hard-mount the
cage directly to the chassis. I switched to some polyurethane parts on the front, and life the more connected feel.

Thanks, -Dave

 

I have never heard of high performance subframe mounts for these cars, but people who have raced them may know. The normal ones are, of course, still available. As the cars are so old now, and racing will not be common, I would not expect any HP mounts remain in production

 

It looks like SNG Barratt USA sells them, part number CAC3067P. I finally found the ones I originally saw at Bob Beere racing, however his were about double the price.

 

Excellent research and post !!

 

I looked up these on the SNG Barrett website. The rubber has a higher "shore rating", so will be less resilient to movement.

 

If you are looking to stiffen up the rear suspension have a look at the way Aston Martin does it on the DB9. It is on the XJS floorpan & is the same cage setup as the sedans. When I saw one on a lift I was impressed with the setup. It may require a little welding but well worth it.