Why US Shift?
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Are you installing for the first time or upgrading an existing installation?Use the buttons below to make your choice, then click Next to continue.
Includes controller, wiring harness, software, and data cable.
Comes with controller and wire leads for new features
Do you have an old-style (91-93) solenoid connector harness on your transmission? This early harness has a problem with leaking fluid at the pass-through connector and GM recommends upgrading to the new connector and wiring harness. Because of this, we don't provide a wiring harness for it. If you have one of these, you'll need to upgrade it. The easiest way to tell if you have one is by looking at the solenoid connector on the transmission. If there is a bolt hole in the center, then you have an old-style harness.Use the buttons below to make your choice, then click Next to continue.
Do you need an updated internal wiring harness?
Do you have a pre-1994 Bosch pressure control solenoid? This solenoid isn't compatible with our controllers, so you will need to upgrade it to the 1994+ Holley solenoid. The older Bosch solenoid is silver, while the newer Holley solenoid is black. If your solenoid is already black, you have the right one and doesn't need to be changed. The required bracket is included with purchase.Use the buttons below to make your choice, then click Next to continue.
Do you need an updated pressure control solenoid?
Do you have a carburetor? Use the buttons below to make your choice, then click Next to continue.
Upgrade a Quick 1 / Opti to Quick 4 by sending in your current controller. You will be able to use the wiring harness already installed in your vehicle. Additional snap-in leads will be provided to allow you to take advantage of all the new features of the Quick 4. Return shipping via UPS Ground for your upgraded controller is included in this price.
Upgrade a Quick 1 / Opti to Quick 4. To eliminate downtime, we will ship a Quick 4 controller immediately via UPS Ground and will include a pre-paid UPS return label to facilitate the easy return of your Quick 1 / Opti after installation. You will be able to use the wiring harness already installed in your vehicle. Additional snap-in leads will be provided to allow you to take advantage of all the new features of the Quick 4. Shipping both ways via UPS Ground is included in this price.
You will need a throttle position sensor to use the Quick 4. Choose the TPS kit below that is compatible with your carburetor. These TPS kits come with all necessary hardware for installation, such as TPS, Brackets, Bolts, and Fittings.Use the buttons below to make your choice, then click Next to continue.
Throttle Position Sensor Kit for Holley Carburetors with no choke. While this kit is designed for Holley carburetors with no choke, it can be adapted to other carburetors and injector pumps.
Throttle Position Sensor Kit for Holley 4160/4150-Style Carburetors with Electric Choke. This TPS kit is an official Holley product designed by Holley for their own carburetors. High quality design with OEM appearance.
Throttle Position Sensor Kit for Edelbrock Carburetors. This TPS kit is designed and manufactured by US Shift. High quality design that appears to be part of the carburetor. Discount applies when purchased with US Shift controller.
This throttle position sensor kit is designed for Street Demon carburetors only and will not fit other Demon models.
Now that we know which components your system will need, click the Finish button to review them for accuracy and begin the checkout process.
If you experience any difficulty during the ordering process, please contact our support team for assistance.
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