QA1 6395-400 63 Series Large Body Aluminum Twin Tube Coilover Shock 9in Stroke 5C/400R

The QA1 6395-400 is a 63 Series large body aluminum threaded twin tube coilover shock absorber featuring a 9-inch stroke, compressed height of 15.38", and extended height of 24.30". Fitted with eyelet top and eyelet bottom mounts, this shock is valved at 5 compression / 400 rebound (linear/digressive piston), making it an excellent choice for circle track coilover applications.

Key Features:

• Sealed, non-rebuildable design — a cost-effective, tamper-resistant spec shock built for competitive racing
• Large threaded twin tube body — provides consistent feel and grip across all track conditions, especially under low-traction scenarios
• 2" O.D. lightweight aluminum body — reduces unsprung weight without sacrificing durability
• Deflective disc valving — non-fading performance with a linear/digressive piston for precise damping control
• Eyelet top / eyelet bottom mounts — 15.38" compressed height, 24.30" extended height, 9" stroke
• 5C / 400R valving — linear/digressive valving option ideal for dirt and asphalt track conditions
• Can be run in any orientation — no change in damping rate regardless of shock angle
• 100% dyno-tested and serialized — every unit verified for consistent, reliable performance
• ACT-legal — approved for use in sanctioned spec shock series and classes
• Made in the USA

The QA1 63 Series is the sealed counterpart to the rebuildable 62 Series, purpose-built as a spec shock for late models, modifieds, and circle track applications on both dirt and asphalt. Its twin tube construction helps prevent binding even if the outer tube sustains minor damage, keeping your car competitive lap after lap.