PERFORMANCE COILOVER KIT (COMPATIBLE WITH 4-PISTON BRAKE CALIPERS) - 350101SPC

1988-1998 GM C1500 Extended Cab
1992-1998 GM C1500 Standard Cab

Minimum 1.25" Rotor

For decades, the 1988–1998 Chevy C1500 (OBS) has been at the heart of the Belltech story. Now, after 40 years of innovation, we’re honoring the platform that helped define us with the most advanced suspension system ever offered for an OBS. Our complete bolt-on system with front and rear coilovers, spindles with brackets to fit 2019+ GM 1500 four-piston brake calipers, and a 4-link conversion kit transforms this classic into a modern-handling machine; delivering tighter control, improved ride comfort, and a fully adjustable stance that turns heads on the street and delivers confidence at the track. Built as a fully bolt-on solution, this system blends performance engineering with everyday drivability, giving enthusiasts the perfect foundation for their next build.

Front Features

• 3” Drop Spindle
• Built from robust ductile iron
• Retains factory track width
• Bolt-on ready with brackets and hardware to fit larger 2019+ GM 1500 four-piston calipers
• Designed to clear 18" or larger wheels
• Forged Aluminum Upper Control Arm + Mounting Bracket
• Built-in +4° caster for improved alignment and handling
• Raised pivot point optimizes anti-dive geometry
• Compatible with OEM and Moog ball joints
• Forged Aluminum Lower Control Arm + Matched Coilover Assembly
• Matched coilover and lower control arm for optimized performance
• Integrated microcellular foam bump stops for refined compression control
• Height-Adjustable Coilovers
• 2” (50mm) of fine-tuned adjustability; set ride height from -1” to -3”
• Composite upper spring adapter ensures proper spring alignment
• Sport-enhanced 300 N/mm spring rate sharpens steering response

Rear Features

• Super C-Notch Assembly
• Expands suspension travel for a controlled, comfortable ride at lower heights
• Boxed  design reinforces frame strength and rigidity
• 3/8” thick hard-anodized aluminum arch support
• Integrated foam overload bump stops
• 4-Link System
• Heavy-duty 2” x 1/4” wall tubing built to plant power to the pavement
• Adjustable axle brackets: 4”–6” ride height
• Tunable anti-squat (75%–120%) and pinion angle for tailored traction + launch
• Rebuildable, greaseable rod ends for long-term serviceability
• Adjustable Track Bar
• Maintains proper axle centering + roll stability
• Constructed from 2” x 1/4” A36 steel with low-friction, triple-wall vulcanized bushings
• Ride-height positions: 4”, 5”, 6”
• Height-Adjustable Coilovers
• 60mm (2.36”) galvanized steel housing for optimized corrosion protection
• Powder-coated high-tensile 35 N/mm spring rate sport-tuned springs
• Progressive-rate polymer foam bump stops provide smooth limit control
• Spherical lower mounts for smooth articulation

This all-new Belltech system brings the iconic OBS platform into the modern era with refined suspension geometry, broad adjustability, and real performance gains; all while preserving ride quality and bolt-on simplicity. Improved bump-steer correction and a tighter turning radius achieve the precision and control of a modern performance truck.

Installation Instructions

• Installation Instructions 1
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