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So as I was told getting rid of my backbox would ruin my mpg, yes I found out it was true but this titanium will replace my centre box/resonator. I will test the spl before and after also as well as mpg. It took one hour and 15 minutes to saw through with the carbide hacksaw, it's hard work. Just the slots to do unless I make sleeves and use stainless rivets, I will post soon..
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