[NASSTY]

The original dog bone tube is 3mm thick. My dog bones have been cut and shut and this centre tube has been replaced with a 10mm thick tube. Laurie Bongailas did this b/c he found out (the hard way) that at high hp the original 3mm tube would split along the shut weld. Bracing along the sides of the dog bone will reduce for/aft flexing but it will not stop twist through the centreline of the dog bone. An engineer has tested the 10mm tube and found it to be 2-1/2 times stronger than the 3mm tube. So it reduces for/aft movement as well as twist (from braking and accellerating).

It's also worth remembering the the original Jag rear end was in a sub frame that was rubber mounted. Most cobras would have the diff mounted directly to the chassis. Consequently, if using the jag trailing arms which use a rubber mount, their effect on reducing for/aft movement would be nil because of the movement in the rubber mount; the rubber will move more than the dog bones could. In a Jag, they would reduce for/aft movement because the whole rear end is rubber mounted so the whole rearend would move within their mounts.

Hope that makes sense.