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Yes, the stock catback exhausts ARE interchangeable...No they are not the same. The LS3 exhaust is a pretty conventional exhaust because it's a pretty conventional V8...the L99 exhaust has a different setup in it to avoid having the car sound "weird" when AFM is on.
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2010 Camaro SS M6. Heads/Cam/Intake/Headers/Exhaust/Suspension
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