Koni 86111258RACE 8611 Series Ext. Double Adjustable Race Strut Insert

The Koni 8611 Series (MPN: 86111258RACE) is a race-grade, externally double adjustable strut insert cartridge finished in Koni's signature yellow. A versatile universal strut insert, the 8611 was originally developed for European touring car classes running strut-based suspensions and has since become a popular choice among club racers and autocrossers in North America seeking an affordable, high-performance damper solution.

Built around twin-tube hydraulic technology, the 8611 Series offers fully independent external adjustment of both rebound and compression damping. Rebound is adjusted via a knob at the top of the strut rod (included), while the compression adjuster is accessed at the bottom of the cartridge. Note: a ½-inch diameter hole must be drilled in the bottom of the strut housing to access the compression adjuster. A threaded locknut to retain the insert is not included and may need to be sourced separately.

Key Features:

• Twin-tube hydraulic construction with external dual adjustability (rebound and compression)
• Rebound adjuster knob included; adjustable without removing the strut from the vehicle
• Compression adjuster located at the bottom of the cartridge for on-car access
• Compatible with extreme high-performance spring rates up to 1,000 lbs. with coil-over sleeve setups
• Includes factory-style spring perches; compatible with Koni coil-over sleeve systems
• Shortened body design provides additional suspension travel for lowered ride heights, reducing the risk of bottoming out
• Bump rubbers included
• Extended length: 24.21 in. | Collapsed length: 17.99 in.
• Body diameter: 1.713 in. | Upper mount: Stud
• Sold individually

Ideal for road racing, autocross, and high-performance driving events, the Koni 8611 Series strut insert delivers the precise, repeatable damping control needed to dial in suspension behavior for competitive motorsport applications.