I recently purchased a drive shaft safety loop to use on my 383 with TTI 2.5" complete exhaust kit (manifolds to tail pipe X pipe system). It is made by US tool and I purchased it on Ebay. I just wanted everyone to know that it fit perfect with the X pipe system. This is a 4 gear car. I am not sure if it would work on a 3 inch X pipe system. It maybe a bit tight.