The box was built by Gartrac engineering & was used in their rear wheel drive mk3/4 escorts usually powered by a 2.8 cologne engine. They are built to stand bhp in excess of 500. I have used one of these in my tarmac stage mk2 escort running a cosworth engine generating 470 bhp (after destroying 2 T5 boxes!) Very strong...comes complete with a cosworth bell housing & prop end so you can put it straight in. (you will have to have the gearbox end of the cossy prop swapped for the gartrac one...10 min job with correct tools)