You only know for 100% when you have it in your hand, but the one from the club a few of years back, came with nothing extra, no screws etc., and fitted "plug 'n play". Just reused the existing fitting nuts and re-used the paper gasket, if that's any guide. Only problems were the TPS screws (gave up, and bought a new TPS, fitted using socket-cap M5x30 bolts), and tempting the 'rubber' trunking to grow to 75mm!
A very worthwhile improvement I found, together with the EGR plate, and even then at over £100, a cheap, effective power-per-pound choice.
David