i have this dump valve lying around that needs to go,visually it's not in great condition,it has scratches on it,the photo makes it look really bad but once polished up (i'll do this before i send it) it actually looks quite presentable

it has a brand new diaphragm and spring fitted and i'd say it was suited to high boost/big turbo cars as it takes quite a lot of pressure to make it dump

£30 posted