It is a Garrett T4, no doubt about that. But..... a T4 off what... Cummins Diesel, Paxman Generator...... almost anything, and unfortunately, they're all a slightly different mix-match of parts.

Maybe it's just the photo's, but that looks a huge exhaust housing on it...... and why would you have cut back blades on a T4 Cossie Turbo. They spool up slowly enough as it it, so why make it worse by cutting back the blades. (Obviously assuming it's been built up for a cossie engine with about 400 - 500bhp, and not some whacko engine). Shame the guy dosen't give the full specification... Ie Exhaust Housing Size, Impellor Size/Part Number. At the price it is now, it would be a bargain...... IF IT'S THE RIGHT SPEC......

It also states it's been built up for a Cosworth Engine...... WHAT SPEC COSWORTH ENGINE ???? 8000rpm Drag Car Engine, with no power below 6000rpm, We could go on for ever on this one.................