Quote:
Originally Posted by Bossxr8
Which is what they did for the R spec. Kept the standard Mustang GT tyres to keep noise down. Took them a few goes to get the exhaust quiet enough too. It was cancelled at one stage. They just wanted one last go at it, and luckily it passed. If it didn't, there would be no R spec.
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The only reason the R Spec passed is that it is second stage manufacturing by Herrod. If it was still first stage by Ford themselves it would not have passed. second stage manufacturers do not need to abide by the same ADR's as stage 1 OEM. They only need to pass static noise, not drive by from what I understand. That's why and how it could come to be.