Wilwood 120-8062-LRD Billet Narrow Superlite Radial Mount Disc Brake Caliper Red - 4R

The Wilwood 120-8062-LRD Billet Narrow Superlite 4R (BNSL4R) is a left-hand, radial mount, 4-piston disc brake caliper finished in red powder coat. Built on the legendary Superlite platform, this caliper extends the series with radial mounting for simplified installation and multi-plane alignment adjustment over the disc. Engineered for short track, late model, modified, open wheel, road race, rally, and performance street applications, it delivers proven big-brake stopping power in a narrow body designed specifically for tight clearance environments.

Forged Billet Construction & Body Design:

The forged billet body is shaped using computer-generated solid modeling and stress analysis technology. Closed-end bridges feature a radial transition to the piston body housings, eliminating machined steps and sharp shoulders in this high-stress area. The result is a measurable increase in overall body strength and resistance to deflection under load. Center bridge bolts replace traditional cotter pins for added support, quick pad access, and positive brake pad retention.

Key Features:

• Radial mount design simplifies adaptation and provides two planes of adjustment for precise alignment over the rotor
• Four-piston equal bore configuration — dual 1.25" / 1.25" aluminum piston bores — delivers balanced clamping force and even pad wear in sustained high-heat conditions
• 1.10" rotor width compatibility
• Replaceable SRS stainless steel bridge plates eliminate bridge wear caused by pad gouging, extend caliper body service life, eliminate pad rattle, and dampen harmonic vibrations that contribute to brake squeal
• One-piece stainless steel pistons resist corrosion and retard heat transfer from pads to caliper body and seals; upgradeable to Wilwood Thermlock pistons for enhanced thermal barrier performance
• High-temperature, square-faced bore seals maximize sealing area and provide controlled piston retraction on release
• Internal fluid passages — no external tubes — eliminate vulnerability to track debris and stress fractures
• Two-piece bleed screws on each end provide long, reliable service life and are easily replaced when necessary
• 1/8" NPT inlet thread size
• Red powder coat finish for corrosion resistance and race-ready appearance
• Direct replacement for all Wilwood Superlite and compatible competitive-brand calipers with 3.50" centered mounting tabs
• Compatible with Wilwood 7420-type bridge bolt brake pads used across the Superlite 6-piston caliper range
• Full range of Wilwood PolyMatrix pad compounds available to match brake response and heat range to any application
• Sold individually

Clamping force, structural deflection, and volume displacement testing confirm the superior strength and efficiency of the Billet Narrow Superlite platform. Whether on the track or the street, the BNSL4R delivers better stopping power with less pedal travel.