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Discussion Starter · #1 ·
I may have a free meal ticket to legally(ish) decatting my m5... the reason being is that as it is lpg converted it outputs a hell of a lot less hydrocarbons (ithink thats what they are???) I had a friend who converted his Escort RS Cosworth to gas and he decatted and passed no problem... so the question i ask is is there any advantage? I have cobra mufflers, with resonator still in ans was simply going to cut out the cats and weld in some straight pipe?

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The restriction in the M5 exhaust is the actual exhaust manifold (down pipe). The M62 and the S62 use the same DP which was a stupid decision.
 
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