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i've tried loads best i've found is turbosmart supersonic for newage but if you've got a classic you can have a megasonic which is louder also well lanes own dump which is based in batley makes a nice noise like a hks but louder. tried blitz car cuts out on corners etc blitz copy better than blitz but still cuts out on corners. hks alright just not my cup of tea hks copy rubbish. greddy type rs good dump near to turbosmart sound but just not loud enough for me. thats all i've tried would like a really really loud one but don't think there's one out there hope this helps
Nice one mate ill have a look at them,i want a nice loud swooshhhh. has well lanes got a web site?
yes its www.well-lane.co.uk they sell cars mainly on site so you might have to phone about dump valve cos me mate got his from there as he like that noise too.