Air and Fuel› Superchargers, Turbochargers and Components

ADD W1

Blow Off Valve Sound Plate Adapter

$79.99

SKU: BOV-S-C-G-2.7

In Stock
In Stock
Ships by Sep 9
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$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The ADD W1 Blow Off Valve Sound Plate Adapter is designed for Chevrolet and GMC 2.7T engines from 2019 and up. This adapter fits between the factory bypass valve and the turbocharger to vent excess boost pressure, producing an aggressive blow-off valve sound. It features three adjustable set screws for fine-tuning the vented air volume and sound intensity.
Show original supplier description
Upgrade your turbocharged GM truck with the ADD W1 Adjustable Blow Off Valve (BOV) Sound Plate Adapter. This results in the signature "Pshhhh" sound associated with blow-off valves, without requiring the replacement of the factory diverter valve. Unlike standard sound plates, the ADD W1 adapter offers enhanced customization through three adjustable set screws. These allow you to precisely tune both the volume of vented air and the intensity of the blow-off sound to suit your preferences and driving style. The adapter is precision CNC-machined from lightweight 6061 billet aluminum and finished with a durable black anodized coating, ensuring long-lasting performance and an OEM-quality fit. Installation is a direct bolt-on process, requiring no cutting or permanent modifications to your vehicle, and it is fully reversible. The kit includes the adjustable sound plate adapter, an O-ring seal, a worm gear clamp, all necessary installation hardware, and instructions. Note that the Blow Off Valve (BOV) itself is not included; this product is solely a sound plate adapter intended to enhance the sound produced by the factory bypass valve. This adapter is specifically designed for the following vehicles: 2019+ Chevrolet Silverado 1500 2.7L Turbo, 2019+ GMC Sierra 1500 2.7L Turbo, 2023+ Chevrolet Colorado 2.7L Turbo, and 2023+ GMC Canyon 2.7L Turbo. Supported model years extend up to 2026 for these configurations.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandADD W1
Part NumberBOV-S-C-G-2.7
CategoryAir and Fuel

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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