well i have been amassing parts for El Gordo now for a bit. mostly random bits like wheel cylinders. Shoes springs variouse bits and bobs but i've always wanted sta 1 echaust bits. Rather than spends 100 odd squid on one i used the power of ebay.
cost so far:
1 x Manifold (came with a carb) £15
1 x Freeflow manifold £2.50 (so pleased with that!)
1 x Maniflow RC40 back box £10 (well £20 with P&P)
1 x K&N cone filter (proper one not a cheap remake) £30-45 (can't rember)
i got to say thats bloody good going so far

so happy , few more bits and bobs and i'm done!