its a std downpipe with the cat chopped off and a pipe with lambda boss welded in. Not neatest but does the job. Mates to a standard system .£35

would this fit on a 1L?

it will with a g40 manifold and is significantly larger bore that 1litre

I can get hold of one but it has a broken stud!

does it need the manifold for fitting to a GT?

yes - bigger bore, can probably get one fro £20 tho

bump