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AFM Exhaust Valve

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Old 04-22-2024, 05:16 PM
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BFLORA8
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Default AFM Exhaust Valve

I have a 2019 Grand Sport A8 and I recently installed an AWE Touring axle back exhaust. My car had the NPP (AFM) and when the shop installed the AWE exhaust, they simply took the AFM valve and tied it to the car since it was no longer needed.

Unfortunately, AWE did not send the simulator plate to go on the valve to prevent CEL’s. I now have a CEL (P26C8) and I believe it must be from not having the simulator plate on the AFM valve. I contacted AWE and will either buy them or have them shipped to me since they didn’t come with the exhaust. My issue is I no longer have the three small bolts that attach the valve to the exhaust or in my case, the simulator plate. I can’t find any information anywhere on what size the bolt is or if I could even get 6 OE bolts so I can properly attach the simulator plates. My local Chevy dealership was no help and don’t specialize in Corvettes so I’m turning to everyone here for help! Any information would be greatly appreciated. TIA


Old 04-23-2024, 11:15 AM
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96GS#007
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Pull one off the NPP valve for comparison. They use the same one.
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Old 04-23-2024, 11:51 AM
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96GS#007
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Originally Posted by 96GS#007
Pull one off the NPP valve for comparison. They use the same one.
I'll also mention it's likely an M8x1.25 and ~20mm-22mm in length. GM has affinity for this size.
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