The things that are making me think it will have a single exhaust is that its already on a small chassis, its only a TT6 engine and not the V8 like an M3, and its not really that much wider than an E36. It also doesnt make sense to test it without the dual exhaust because then the current tests woiuldnt have final performance numbers due to factors such as the weight it might add or even the extra performance afforded by the exhaust.
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