Originally Posted by mlarco52
Judging from those pics in the first post they seemed to have done away with the rear factory exhaust valves, wondering where they relocated them to or how they worked around that.
From my understanding Borla told me they left the MDS valves alone, so there must be two sets in the exhaust system. I've only noticed the valves near the rear end and those are removed with the Borla exhaust. Maybe the rear valves are for sound only? Either way according to the the SRT Engineer chat, the valves do allow the MDS to operate over a slightly larger range, so removing them shouldn't be a big deal. They are there for sound control. Borla says the new exhausts sound great across the engine range and without drone.
Anywho, if you're unsure just wait a while longer and members will be posting up their results.
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