Yeah, even if i wanted to use the rear exhaust pipe, id have to chop off about 2" and weld a massive transition flange to it. One of the pitfalls i suppose of getting a larger turbo fitted to a kit that was designed for a slightly smaller turbo. Im assuming the original T4 was build around the t76, a common size that fits well in the engine compartment for an fbody. The VSR 7875 billet gen 2.5 is more equivalent to a S400 turbo in physical size.