Koni 86-1647 Special Classic Series Internally Adjustable Twin-Tube Non-Gas Strut Insert

The Koni 86-1647 is a Special/Classic 86 Series strut insert engineered for classic performance vehicles. Finished in KONI's signature red paint, this twin-tube, non-gas-charged hydraulic strut insert features internal rebound damping adjustment, allowing precise tuning without external tools. It is a direct cartridge-style replacement designed to fit existing original strut housings, including Boge-style units.

Key Features:

• Internal rebound adjustment — damping is set by removing the insert from the strut housing, providing precise control over ride firmness
• Twin-tube hydraulic design — non-gas charged construction delivers smooth, consistent damping and a balanced ride quality
• Red-painted finish — KONI Classic/Special series signature color finish
• McPherson strut cartridge format — drop-in replacement for original strut housings
• Adjustable valving — allows tuning between a comfortable OEM-style ride and firmer performance-oriented handling
• Sold individually — one strut insert per package
• Not remanufactured — new-production KONI unit

KONI has been engineering adjustable dampers since 1945 and is widely recognized as a benchmark for performance shock absorber technology. The Classic/Special 86 Series line is purpose-built for older performance and sports cars, using application-specific damping calibration to restore or improve ride and handling beyond original factory specifications. KONI is part of ITT Motion Technologies and holds an extensive motorsports heritage, including over 250 victories and multiple Formula 1 World Championships.