This is and upgrade to the stock axles for the TC, what we have been doing for these cars is this. When we first looked at Leslie (Durst) Armendariz's Axles we noticed the inner spline were extremely large and quite strong. The c.v. it self was not, what we have been doing is having the you the customer send In your axles and we then cut off the factory inner c.v. and weld one if our billet housings to is. We then make high grade chromoly bars with larger spline to cover the center and then make a special outer C.V. that has larger splines to handle the HP. We go on to make a custom hub for the car that is a replica of the factory hub but has the larger C.V. spline in it for the new outer. The outer is machined for the ABS rings so don't worry about that. This is a process done to your axles and takes about 10 days to produce. To have this set doe you will need to call the office an ask for an RMA number to have the parts sent in. for now this will be only type set we will be making for this platform.