Description
SPDZ1 AFM & NPP Exhaust Valve Simulators for C8 Corvette (2020-2024)
💡 Say goodbye to check engine lights when upgrading your C8 exhaust.
If you’ve installed an aftermarket cat-back exhaust on your 2020-2024 C8 Corvette that doesn’t include factory-style AFM (Active Fuel Management) or NPP (Dual-Mode Performance) valves, you’ve likely seen the dreaded CEL (Check Engine Light). These plug-and-play AFM/NPP valve simulators are the proven solution.
🔧 How They Work
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Plugs directly into your C8’s factory exhaust valve harness
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ECU is “tricked” into thinking the valves are still present
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No cutting, no splicing — just connect, zip-tie out of the way, and drive
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Prevents AFM/NPP valve malfunction codes and CEL warnings
✅ Why You Need Them
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Aftermarket Exhaust Upgrade: Almost every C8 with an aftermarket exhaust needs AFM simulators.
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Performance Models (NPP): If your C8 came with the factory Valved Performance Exhaust, you’ll also need NPP simulators unless your new exhaust has valves.
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Base Model Exhausts: Only AFM simulators are required.
📦 Fitment Guide
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Base Model Exhaust (Non-Valved): Requires 1 pair (AFM only) to avoid CEL.
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Performance Model Exhaust (Valved/NPP): Requires 2 pairs (AFM + NPP) to avoid CEL.
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This listing is for ONE PAIR.
🔥 Key Benefits
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Eliminates CELs caused by missing AFM/NPP valves
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Seamless integration with factory wiring
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Works with all 2020, 2021, 2022, 2023, and 2024 C8 Corvettes
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Plug-and-play installation (no permanent modifications)
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Built tough for long-lasting reliability
- This purchase includes (1) Pair - (2) Simulators
Upgrade your C8 the right way — enjoy your aftermarket exhaust sound without the hassle of warning lights or error codes.
