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NPP - Each side has two exhaust tips. The inboard pair (one each side) are always operational and exhaust flows through the muffler baffles before exiting. The outboard pair are "straight through" and gases do NOT pass through the baffles. There are valves on the outboard pair to determine when they are operational (or not). Opening them increases volume and changes the overall tone. I REALLY wanted this option on my car, but went without to get everything else. I put on the GM Performance exhaust upgrade (Borla S-Type wearing a Bow Tie) and couldn't be happier.
The strut brace is present on the convertibles (most) to enhance body stiffness due to the "missing roof".
Launch Control is present on all Camaros, I believe. It's on all the V8's, at least.
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