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The Dinan axle-backed exhaust does not produce the sound gain that some of competitors produce. So look elsewhere if you want high volume of sound gains on the exhaust alone. But combine it with a resonator delete and the Dinan x-pipe, I find it to be perfect low tone balanced exhaust note. Plenty of refined volume. Just right for a V8 M550 luxury sedan. Can’t comment on your warranty question. I have already thrown the dice with a tune.
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