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2,794 Posts
Hi mate, I've got a big boare 4, only bought it because it was cheap... made no difference to the noise but this actualy suits me as I'll soon be learning I won't be driving around with a loud exhaust and can also concentrare more on the sound of the engine. The backbox does not go straight through like other exhausts such as rage, I think this is actualy a good thing as it retains the back pressure. Heres a pic 
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