Cusco 6C1 64W CN Sport TN-S Monotube Coilover Kit 8K Front / 8K Rear 24-Way

The Cusco Sport TN-S Coilover Kit (Part# 6C1 64W CN) is a precision-engineered, full-length adjustable monotube suspension system designed for the sport compact platform. Built on Cusco's motorsport heritage, the Sport TN-S bridges the gap between daily drivability and serious track performance by delivering professional-grade adjustability tuned around street performance tires.

At the heart of the system is Cusco's proprietary TNS Twin Needle System (Twin-Needle Valve) — a technology that provides completely independent, 24-level adjustment of both compression and rebound damping forces. With 24 steps on each side, drivers have up to 576 unique damping combinations available, allowing fine-tuned correction of understeer and oversteer behavior through corners, and precise setup changes when swapping spring rates.

Key Features:

• Monotube (single-tube) shock absorber construction with large-diameter piston for stable, consistent damping force under high loads
• 24-level independent compression and rebound adjustment (2-way) via the Twin Needle System
• 8 kgf/mm front and 8 kgf/mm rear standard spring rates with optional spring rate availability
• Full-length adjustable ride height — inverted (ram-type) front strut design
• Pillow ball adjustable front upper mount for camber and caster tuning
• Reinforced rubber rear upper mount for improved street comfort and noise reduction
• Compatible with high-grip radial tires (UTQG 200 and higher) — optimized for street performance and track days on sport compounds
• Cusco Sport Blue Springs included
• Alternate Part Number: 6C1-64W-CN | UPC: 4996338112965

The Sport TN-S was developed following the Sport R specification but with damping force, spring rates, and stroke calibrated for street-oriented driving. It is the ideal choice for enthusiasts who track their daily car or compete in events requiring street tires, delivering motorsport-level tunability without sacrificing everyday ride quality.