Stainless Steel WOT Microswitch Kit – TH400 ST400 Kickdown / Universal Trigger Switch (Holley 4160)

Tested & Proven

Designed, cut, and assembled right here in Pennsylvania, this kit has been run for over two years on my personal 1975 C20 and 1982 Corvette without a single hiccup. Whether you need a reliable TH400/ST400 kickdown or a universal wide-open-throttle trigger, this is the solution has been proven on my daily drivers.

• 100% Stainless Steel – Laser-cut, rust-resistant, and stronger than plastic or aluminum brackets that bend or corrode.
• Precision WOT Activation – Crisp snap-action microswitch ensures intentional, reliable engagement.
• Versatile Fit – Works with Holley 4160 carburetors and similar models (including Summit Racing carbs).
• Multiple Uses – Kickdown control, NOS activation, electric fuel pump staging, cooling fan override, water-meth injection, exhaust cutouts, shift light trigger, and more.
• Complete Kit – Microswitch, bracket, stainless hardware, automotive-grade SXL 16 gauge wiring, and crimp connectors included.
• Dual Wiring Options – Supports both normally open and normally closed configurations.

Orders ship quickly from Pennsylvania. I personally stand behind every kit I make and assemble. 

Included in the Kit:

• Stainless steel bracket with pre-mounted snap-action microswitch
• 24" Red SXL automotive wire with pre-crimped female spade
• 24" White SXL automotive wire with pre-crimped female spade
• All stainless mounting hardware
  

Specs:

• Material: Laser Cut Stainless Steel
• Includes: Microswitch, bracket, hardware, wiring, and connectors
• Fits: Holley 4160 carburetors (and other similar carbs like Summit Racing Carburetors)
• Condition: New

 Whether you’re restoring a muscle car, building a restomod, or setting up a race-ready hot rod, this stainless steel microswitch bracket kit delivers reliable WOT activation for transmission kickdown or your custom performance setup.