C8 Corvette AFM & NPP Exhaust Valve Simulators

C8 Corvette AFM & NPP Valve Simulators – Plug-and-Play CEL Prevention

Prevent an annoying check engine light on your C8 Corvette after installing an aftermarket exhaust with AFM or NPP valve deletes. Our AFM & NPP Valve Simulators are designed to seamlessly communicate with your Corvette’s ECU, eliminating fault codes caused by missing factory exhaust valves.

When the OEM valves are removed, the vehicle detects a fault and triggers a CEL. These simulators plug directly into the factory wiring harness and “fool” the system into thinking the valves are still present—no tuning, no coding, and no hassle.

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Product Description

Built for simplicity and reliability, these direct plug-and-play simulators are the cleanest solution for C8 owners running non-valved exhaust systems. Installation takes just minutes and requires no permanent modifications. Once installed, your dashboard stays clean—no warning lights, no reduced drivability, and no headaches.

Design updated in 2022: the installation concept remains the same, but the kit now includes 4 connectors instead of 3, offering improved compatibility and ease of use.

Note:

Yes, factory valves use 4–5 pin connectors. The simulators only require 3 active pins to correctly replicate valve signals and prevent a CEL. It works exactly as intended—don’t overthink it

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Key Features

    •    Prevents Check Engine Light (CEL) caused by AFM & NPP valve removal

    •    True Plug-and-Play Design – no cutting, splicing, or tuning required

    •    Updated 2022 Design – now includes 4 connectors

    •    OEM-Style Fitment – connects directly to factory exhaust valve harness

    •    Ideal for Aftermarket Exhaust Systems without valves

    •    Fast Installation – installs in minutes

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Compatibility

    •    Chevrolet Corvette C8 (All Models)

    •    Vehicles equipped with AFM & NPP exhaust systems

    •    Intended for use with aftermarket non-valved exhausts

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Installation

    •    Locate factory exhaust valve connectors

    •    Plug simulators directly into OEM harness

    •    Secure and enjoy a CEL-free dashboard

Professional installation not required.