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I fitted one about 2 months ago, dead easy to fit. The only difference it made was in noise. It terms of performance absolutely nuffin'. I knew this when i got it tho, i just like the sound it makes.
also fitted a baileys dump valve on my uk98 had no problems there apart from the loud wwwwwhhhhhhooooosssssshhhhh!!!! makes people move outta the way too!!! he he
