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SVT Shelby GT500
Put Borla XR1 Catback on the Shelby
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<blockquote data-quote="06torchredgt" data-source="post: 16133020" data-attributes="member: 175558"><p>IIRC, I believe the Borla Pro XS series mufflers are Borla's basic turbo/multi-core muffler, just as you brought up and also might be similar with their XR-1 series race design as well, but that's just an assumption on my part lol. IMO I think most of the drone issues on the 2005-10 4.6L cars is due mostly from the design of the 3 valve motor and also from the location of the mufflers to the rear. If Ford, on the other hand, had kept the mid-muffler design in place from 99-04 along with retaining the 2 valve 4.6L? I really don't think interior resonance drone would be quiet as much of a factor lol.</p></blockquote><p></p>
[QUOTE="06torchredgt, post: 16133020, member: 175558"] IIRC, I believe the Borla Pro XS series mufflers are Borla's basic turbo/multi-core muffler, just as you brought up and also might be similar with their XR-1 series race design as well, but that's just an assumption on my part lol. IMO I think most of the drone issues on the 2005-10 4.6L cars is due mostly from the design of the 3 valve motor and also from the location of the mufflers to the rear. If Ford, on the other hand, had kept the mid-muffler design in place from 99-04 along with retaining the 2 valve 4.6L? I really don't think interior resonance drone would be quiet as much of a factor lol. [/QUOTE]
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SVT Shelby GT500
Put Borla XR1 Catback on the Shelby
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