Universal Low Clearance 4 Window Power Window Kit - Specialty Power Windows

The Specialty Power Windows (SPW) Universal Low Clearance 4 Window Power Window Kit (Power Wonder-Lift Modified) is an ultra-low-profile, cable-driven power window conversion system engineered specifically for four-door vehicles with shallow door cavities. Purpose-built for unchopped "Tall T" Ford sedans, vintage four-door street rods, touring cars, and custom four-door builds where standard 8-1/2" depth is unavailable, this four-window setup requires only 5-1/2 inches of vertical clearance beneath the lowered glass across all four doors while delivering full travel and self-aligning operation.

System Architecture & Engineering Highlights

• Ultra-Low 5-1/2" Cavity Clearance: Operates within a compact 5-1/2" minimum clearance requirement between the bottom edge of the lowered glass and the bottom of the door shell—3 full inches less than standard regulators—allowing four-window electric conversions in tight front and rear doors.

• Self-Adjusting Floating Tube Architecture: Incorporates SPW's patented floating coined and slotted metal guide tubes across all four assemblies. The drive mechanism self-aligns dynamically as the glass travels, compensating for variations in door curvature, pitch, and channel alignment to prevent binding and motor stress.

• Full 22" Vertical Travel: Provides up to 22 inches of vertical travel, accommodating tall vertical side glass without restricting the window's full drop into the door cavity.

• Four OEM-Style High-Torque Motors: Powered by four individual 12V OEM-grade electric motors engineered to handle heavy laminated safety glass and vintage tempered side windows with smooth, quiet operation.

• Complete Four-Door Electrical Suite: Supplied with a dedicated four-door pre-terminated wiring harness, GM-style chrome switches (including a 4-gang driver master switch and three single passenger switches), and four flexible stainless steel wire conduits for clean, pinch-free door-jamb routing.

Technical Specification Matrix

Kit Contents Checklist

• Mechanical Regulators: (4) Low-Clearance Cable-Driven Window Regulators with Floating Coined & Slotted Guide Tubes

• Drive Motors: (4) OEM-Style High-Torque 12V Electric Motors

• Glass Mounting: (4) Universal Lower Glass Channels

• Controls & Electrical: GM-Style Chrome Switch Set (1 Four-Gang Driver Master Switch, 3 Single Passenger Switches), Complete Pre-Wired 4-Door Harness with Motor Plugs

• Door Pass-Throughs: (4) Flexible Braided Stainless Steel Wire Conduits

• Hardware & Documentation: Complete Mounting Bracket & Fastener Kit, Written Installation Guide

Installation & System Notes

• Cavity Depth Verification: Measure vertical clearance between the bottom edge of the lowered glass and the inner floor/structure of all four door shells to confirm at least 5-1/2 inches of clear space prior to mounting regulator brackets.

• Glass Bedding & Alignment: Clean the lower edge of each window glass thoroughly before securing it into the supplied lower glass channel using professional auto glass setting tape or high-strength urethane adhesive. Ensure each glass panel sits completely level across the channel base before curing.

• Stainless Conduit Alignment: Stagger the drill holes between the door jambs and the body pillars across all four doors to ensure each flexible conduit forms a natural, gentle "S-curve" when closed, preventing wire pinching or fatigue over time.

• Run Channel Preparation: Inspect, clean, and align factory felt or rubber side glass run channels on all doors, applying dry silicone spray to reduce sliding friction and lighten mechanical motor load.

Instructions