Action Clutch ACR-0662 Stage 5 Clutch Kit 2006-2011 Honda Civic Si 2.0L K20Z3

Vehicle Fitment

• 2006-2011 Honda Civic Si - 2.0L DOHC (K20Z3); 6-Speed Manual Transmission

Fitment Notes

• Fits the eighth-generation Honda Civic Si (FG2 coupe and FA5 sedan) equipped with the K20Z3 2.0L DOHC engine and the factory 6-speed manual transmission - does NOT fit the 2012-2015 Civic Si (K24Z7 engine), the 2016-2021 Civic Si (L15B7 turbo), or any Civic non-Si model using different engine/transmission configurations
• A flywheel is required for installation - the ACR-0662 does not include a flywheel; the existing flywheel must be resurfaced (or replaced with a performance flywheel such as the Action Clutch K-series chromoly or aluminum unit) before installation; failure to resurface the flywheel will void the product warranty
• This kit is intended for race applications, heavy track use, and light street use - it is not a daily driver clutch; ceramic disc materials wear faster in constant low-speed engagement environments (traffic, parking lots) compared to organic or Kevlar discs; buyers who daily drive their Civic Si should consider Stage 1 or Stage 2 kits for better street drivability
• Contact Action Clutch before ordering if uncertain about stage selection - purchasing a kit that is mismatched to your engine's power output can cause premature clutch failure, transmission damage, and voided warranty eligibility
• This item is a replacement/service part and is non-returnable and non-refundable unless the product arrives defective.

Features

• Stage 5 (2MS) dual clamp load pressure plate - the defining structural distinction of the Stage 5 over the Stage 3 (1MS) is the pressure plate design; where Stage 3 uses a single diaphragm, Stage 5 uses a dual clamp load heavy-duty diaphragm that applies significantly greater clamping force to the disc surface; this dual-load design enables the Stage 5 to reach 562 ft/lbs of torque capacity (crank torque) - substantially more than the Stage 3 configuration - making it the appropriate choice for highly modified K20Z3 builds with forced induction, aggressive cams, high-compression, or other power modifications that exceed Stage 3 capacity
• Sprung MIBA Ceramic 6-Puck disc - the ceramic puck contact points provide exceptional grip and heat resistance at clutch surface temperatures that cause organic friction materials to fade; the sprung hub absorbs drivetrain shock at engagement, distinguishing this kit from the Stage 4 (1MD) and Stage 6 (2MD) rigid designs; the sprung hub makes the Stage 5 substantially more livable on light street use and short track sessions than an unsprung ceramic kit, while delivering the ceramic material's superior holding capacity and heat tolerance
• Reinforced drive straps - the dual clamp load pressure plate features reinforced drive straps for increased durability under repeated high-load engagement cycles and sustained race environments
• Patented fully enclosed spring retainers - Action Clutch's proprietary enclosed spring retainer design prevents springs from ejecting during use; spring ejection can cause catastrophic engine or transmission damage, and this retainer design is a key safety differentiator versus competing clutch kits for the K20Z3 platform
• Torque holding capacity: 562 ft/lbs (crank torque) - rated in crank torque, not wheel torque; this represents a substantial increase over both factory and Stage 3 configurations for the Civic Si
• SFI Spec 1.1 certified - meets SFI Foundation specification 1.1 for replacement flywheels and clutch assemblies
• Individually quality checked - every kit is assembled and signed off by Action Clutch's engineering team (over 60 years of combined experience) before release
• Clutch chatter is normal during and after break-in - ceramic disc engagement introduces some chatter at low engagement speeds, most noticeable during parking lot maneuvers; chatter will reduce but not fully disappear after proper break-in and is inherent to ceramic friction materials, not a defect

Specifications

• Part Number: ACR-0662
• Stage: 5 (2MS - Dual Clamp Load, MIBA Ceramic, Sprung)
• Disc Type: Sprung MIBA Ceramic (4 or 6 Puck - 4 puck is more aggressive)
• Pressure Plate Type: Dual Clamp Load Heavy-Duty Diaphragm with Reinforced Drive Straps
• Torque Holding Capacity: 562 ft/lbs (crank torque)
• Intended Use: Race applications / Heavy track use / Light street use
• NOT Recommended For: Daily driving or constant low-speed street engagement
• Flywheel Included: No - must be sourced separately or existing flywheel resurfaced
• SFI Certification: SFI Spec 1.1
• Break-In Required: Yes - 500 street miles minimum; RPMs under 4,500; no more than half-throttle; no boost during break-in
• Price: $750.34

Included Components

• 1x Sprung MIBA Ceramic Clutch Disc (4 or 6 puck - verify puck count when ordering)
• 1x Dual Clamp Load Heavy-Duty Pressure Plate
• 1x Conventional Release Bearing
• 1x Pilot Bearing / Bushing (when applicable)
• 1x Clutch Alignment Tool
• Note: Flywheel is NOT included - must be sourced separately or existing flywheel resurfaced before installation

Product Description

The Action Clutch ACR-0662 is a Stage 5 (2MS) MIBA Sprung Ceramic clutch kit for the 2006-2011 Honda Civic Si equipped with the K20Z3 2.0L DOHC engine and 6-speed manual transmission. It represents a significant step up from the Stage 3 (1MS) in both clamping force and torque capacity - the dual clamp load pressure plate replaces the single diaphragm of the Stage 3 with a dual-load design that pushes torque holding capacity to 562 ft/lbs (crank torque), accommodating highly modified K20Z3 builds with forced induction, aggressive camshafts, or other power modifications that exceed Stage 3 limits.

Despite the step up in capacity, the Stage 5 retains the sprung hub ceramic disc design - the hub springs absorb drivetrain shock at engagement, making this kit meaningfully more drivable than Stage 4 and Stage 6 rigid disc configurations for light street use and track days that also involve some road driving. The ceramic friction material maintains consistent grip at sustained high clutch surface temperatures where organic materials fade, making the Stage 5 appropriate for repeated hard launches, long track sessions, and high-RPM shift cycles that would overwhelm lower-stage kits on a built K20Z3 Civic Si. Action Clutch's patented fully enclosed spring retainers prevent spring ejection - a failure mode that can destroy transmissions - and every kit is individually signed off by Action Clutch's engineering team before shipment.

A flywheel is not included and must be sourced separately or the existing flywheel resurfaced before installation. This kit is not recommended for exclusive daily driving - ceramic disc materials wear faster in low-speed constant engagement traffic conditions than organic alternatives, and the dual clamp load pressure plate produces a heavier pedal than stock. A 500-mile street break-in is required; failure to complete proper break-in voids the warranty. This item is non-returnable and non-refundable unless the product arrives defective. SFI Spec 1.1 certified. Backed by Action Clutch's 1-year limited manufacturer defect warranty.