WOT Micro Switch Bracket 4150

The WOT Micro Switch Bracket 4150 from ALLSTAR PERFORMANCE is a precision-engineered control module designed for nitrous oxide systems paired with Holley 4150 carburetors. This bracket assembly integrates a micro switch mechanism that manages Wide Open Throttle (WOT) activation, allowing your nitrous system to fire only when full throttle is detected. Built for serious performance enthusiasts and drag racers, this component ensures your nitrous injection engages safely and predictably, eliminating accidental activation during part-throttle driving and protecting both your engine and transmission from unwanted stress.

The micro switch bracket operates by mounting directly to your Holley 4150 carburetor, positioning a sensitive switch lever in contact with the throttle linkage assembly. As you press the accelerator pedal to full throttle, the mechanical linkage triggers the micro switch, completing the electrical circuit that activates your nitrous solenoid. This fail-safe design relies on direct mechanical actuation rather than electronic guesswork, meaning your nitrous fires with absolute consistency every time you hit WOT. The compact form factor (2.1 x 1.55 x 4.05 inches) fits cleanly on the carburetor body without interfering with fuel bowl access or air cleaner fitment, and the kit includes all necessary mounting hardware for straightforward installation on your 4150-family carb.

This WOT micro switch bracket is essential for any carbureted nitrous system running a Holley 4150 carburetor—whether you're building a street machine, strip warrior, or weekend bracket racer. It's particularly valuable for builders who want redundant safety layers, as mechanical WOT switches eliminate dependency on problematic electronic throttle position sensors that can drift or fail. The lightweight design (0.08 lbs) adds virtually no mass to your intake, and proper installation takes less than an hour with basic hand tools. If your nitrous kit did not include a dedicated WOT control mechanism or if you're upgrading from an older electronic system to mechanical reliability, this bracket delivers the precision and durability that separates consistent racers from those dealing with intermittent nitrous engagement problems.