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2 years ago I bought a MSDS http://www.msdsinc.com/ header and I love it. It's actually a shorty set. I then had a 2 into 1 piece fabricated at the local muffler shop and pieced the rest of the exhaust together. I run an unmuffled exhaust on my 89 325is and get db reading of 98.(I have to turn the 45 degree elbow at the end of the exhaust away from sound control)
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