pic of it before i fitted it to the car:
3 main parts as from RS components...
regulator: G1/4 pneumatic miniature regulator
RS Stock no: 122-655 £16.56
blow off valve: G1/4 pressure relief valve
RS Stock no: 398-9114 £19.27
non return valve: Pneumatic in line non-return valve,G1/4
RS Stock no: 384-7666 £17.85
plus the other bits, elbows, stems, nipples, push on fittings etc which were free issue as i had them lying abuot at work anyway
to follow: how to set it up once installed....