The Billet Air Shutoff w/10″ Velocity Stack:
The core product is a precisely machined (Billet) air shutoff valve made by KTD Diesel, and it includes a 10-inch Velocity Stack (a funnel-shaped inlet that helps air flow smoothly into the turbocharger compressor).
-Can Be Interchanged with Our Air Filter Adapter As Well:
This suggests a modular design where the air shutoff assembly can be easily swapped out for a standard air filter adapter (and vice-versa) using the same mounting mechanism.
-Aluminum Steel Slide, Stand, Trip, and Hardware:
This is confusing phrasing. It likely means the valve mechanism uses a combination of aluminium (for lightness, possibly the main housing/stack) and steel (for durability, possibly the slide, stand, trip pin, and associated hardware).
-.400″ Thick Velocity Stack Can Be Drilled and Tapped For Water Injection:
The thickness of the velocity stack wall is 0.400” inches, which is substantial enough to allow an installer to drill and cut threads (tap) into it to install nozzles for a water system.
-Includes Clamp and Trip Pin:
The necessary components for mounting and activating the shutoff are included.
Air Shutoff Mechanism (Safety/Kill Switch)
-Dual Trip Mechanism, for Rear and In Cab Air Kill Cables:
This is a crucial safety feature, it allows the valve to be operated by two separate cables.
In racing, one cable is often run to the cabin for the driver (or passenger) to pull in an emergency, and the other is run to the exterior/rear of the vehicle so safety personnel can shut the engine down from outside.
-Can Also Utilize a Single Trip Hole and Pin, For Those Only Using 1 Cable:
Provides flexibility for installations that only require one emergency shutoff cable.
Installation and Fitment
-These are Meant to V-Band Directly to the Compressor Cover, Or Order Our V-band Adapter for Your Compressor Size:
This explains how the unit mounts to the turbocharger.
It is designed to use a V-band clamp directly onto the turbo’s compressor inlet.
If the turbo doesn’t have a V-Band inlet, you would need to purchase a separate V-band adapter specific to your turbocharger’s size and style.





