I have a Dep full system on my red Dt, and it's still like new. I am anal in maintaining it though, mainly because I knew it was flaky finish to start with. Not a cheap replacement so you would think they could at least build in some resilience to the finish. Does liven up the engine though.
@Calum hi all i changed the front to a 15 now and its fine now does 68 in 5th and should rev out in 6th should do about 80 but haven't had a open road with out traffic, very strange to lower the std gearing would this been part of the restriction ?