ISC suspension coilovers are fully adjustable height and damping units designed for road and track use. Each kit is vehicle-specific and includes all hardware required for a direct bolt-on fitment. Spring rates and damper valving are matched to the vehicle's weight and intended use, giving you the adjustability to fine-tune ride height without compromising damping performance.
Key Specifications
Damping Adjustment
32-way adjustment
From full soft to full firm, allowing you to tune for daily comfort or track-focused response.
Upper Mounts
T6061 forged aluminium
Lighter and stronger than cast alternatives. Maintains precise geometry under load.
Springs
SAE9524 spec
Compression tested 600,000 cycles. Under 5% deformation. Surface coated against rust.
Shock Design
Mono-tube
Large cylinder and piston. Nickel electroplated body for corrosion resistance and long service life.
Ride Height Range
Up to 3 inches (7 cm)
Adjust stance without compromising suspension travel or geometry.
Pillow Ball Mounts
Optional (MacPherson)
Available for strut-type applications. Allows camber adjustment for improved tyre grip.
Mono-Tube vs Twin-Tube
ISC uses a mono-tube shock design throughout the range. In a mono-tube unit, the oil and gas charge occupy separate chambers within a single cylinder. This results in a larger piston diameter for the same overall shock length, which translates to more consistent damping and better heat dissipation under sustained use.
Twin-tube designs place a secondary outer cylinder around the main working cylinder. The oil must pass between chambers via a base valve, which introduces a slight delay in response and limits piston area. For daily use the difference is small; for track or spirited driving the mono-tube's consistency becomes noticeable.
Setting Ride Height
To adjust ride height, you raise or lower the lower spring perch on the shock body. The lock collar holds the perch in position. Always adjust both sides of an axle equally, and re-check alignment after any height change. A corner-weight balance is recommended for track use once ride height is set.
Setting Damper Firmness
The 32-click adjuster sits at the top of the shock body. Turning it fully clockwise reaches the firmest setting (position 1). Turning fully anticlockwise reaches the softest setting (position 32). For street use, positions 16 to 22 suit most drivers. For circuit use, start around 8 to 12 and adjust from there based on feel.
Full technical specifications, fitment guides and adjustment instructions are included with every ISC kit. Our Johannesburg team can also walk you through setup if you prefer to speak to someone before you start.