Random sources used to develop my version of an RCM style induction kit, with hardpipe.
70 - 160mm Trumpet from Regal Motorsport
70mm SFS Hoses from Ramair/SFS
70-90mm stainless hoseclips via Ebay
160mm K&N Filter from RCM
MAF Tube / Hardpipe, think this was part of one of Niges old Induction Kit cast offs I found in my garage .....
Hoses will need cutting down by about 50%, but you get the idea :