Models this package does not fit
Do not list this kit for:
- 2002–2006 Acura RSX Base five-speed
- 2002–2005 Honda Civic Si EP3
- 2012–2015 Honda Civic Si with the K24Z7
- Automatic-transmission RSX models
- Ordinary non-Si Civic models
- Civic Type R models
- K24 applications without a confirmed conversion flywheel
The RSX Base and RSX Type-S use different original clutch configurations. A conversion flywheel can sometimes allow Type-S clutch use on other K-series applications, but that must be explicitly documented for this exact package.
What comes in the kit?
The advertised package includes:
- Lightweight racing chromoly flywheel
- EXEDY pressure plate
- EXEDY full-face clutch disc
- Release or throwout bearing
- Pilot bearing or bushing
- Clutch alignment tool
- Installation guide
Published specifications
| Specification | Detail |
|---|---|
| Clutch type | EXEDY OE replacement |
| Clutch-disc design | Full-face organic |
| Disc diameter | Approximately 215 mm |
| Spline count | 24 |
| Flywheel material | Chromoly steel |
| Advertised flywheel weight | Approximately 10 pounds |
| Intended use | Stock and lightly modified street vehicles |
| Flywheel included | Yes |
| Warranty | Verify with the package seller |
The listing does not provide a flywheel brand or part number. That information should be confirmed before publication because “racing chromoly flywheel” describes a product category, not an identifiable component.
EXEDY OE clutch performance
The included EXEDY clutch is designed to provide engagement characteristics similar to the original equipment. It uses an organic full-face disc rather than a ceramic or multi-puck friction design.
Expected characteristics include:
- Smooth engagement
- Predictable pedal feel
- Manageable operation in traffic
- Low-speed modulation
- Reduced chatter compared with racing discs
- Suitable holding capacity for stock or mildly modified engines
This is not an EXEDY Stage 1 or Stage 2 racing clutch unless the box specifically identifies it as such. Product pages should not call it a “performance clutch” in a way that suggests a published torque increase.
EXEDY describes its OE replacement range as being designed around original fit and drivability. More manufacturer information is available through EXEDY USA.
What does the lightweight flywheel change?
A lighter flywheel stores less rotational energy than the original unit. This allows the K20 engine to increase and decrease rpm more quickly.
Potential benefits include:
- Faster throttle response
- Quicker rev matching
- More immediate engine-speed changes
- Faster-feeling shifts
- Reduced rotating mass
- More engaging performance driving
Possible tradeoffs include:
- Faster rpm drop between shifts
- Less forgiving launches
- Increased gear rollover noise
- More throttle input required on hills
- Greater likelihood of stalling
- Less factory-like refinement at low speed
The flywheel does not create a major increase in peak horsepower. It reduces rotational inertia, which changes how quickly the engine responds. That is useful; it simply is not free horsepower delivered by wizardry.
Is it suitable for a modified K20?
This package should be appropriate for:
- Stock K20 engines
- Intake and exhaust upgrades
- Mild naturally aspirated tuning
- Daily driving
- Spirited street use
- Occasional autocross
- Drivers wanting smoother engagement than a puck clutch
It may not provide enough capacity for:
- Turbocharged K20 builds
- Supercharged applications
- High-torque engine swaps
- Drag racing with sticky tires
- Repeated hard launches
- Dedicated competition use
The listing does not provide a torque rating. Forced-induction owners should select a clutch with documented crank-torque capacity and adequate safety margin.
Read the Pro Street performance clutch guide for help comparing organic, Kevlar and ceramic clutch materials.
Symptoms of a worn RSX or Civic Si clutch
Replacement may be necessary when the vehicle develops:
- Engine speed rising without matching acceleration
- Slipping during higher-gear acceleration
- Burning clutch odor
- Engagement near the top of pedal travel
- Shudder during takeoff
- Difficulty selecting gears
- Release-bearing noise
- Reduced acceleration under load
Hydraulic problems can produce similar symptoms. Check the clutch master cylinder, slave cylinder, hydraulic line and pedal adjustment before removing the transmission.
Explore the Pro Street Acura technical archive and Honda technical articles for additional diagnostic information.
Installation considerations
While the transmission is removed, inspect:
- Rear main engine seal
- Transmission input-shaft seal
- Release fork and pivot
- Clutch master cylinder
- Slave cylinder
- Hydraulic hose
- Axle seals
- Engine and transmission mounts
- Flywheel and pressure-plate bolts
Before installation:
- Confirm the EXEDY clutch number.
- Identify the flywheel manufacturer and part number.
- Compare the flywheel with the original component.
- Verify the clutch’s 24-spline hub.
- Check clutch-disc orientation.
- Clean the flywheel and pressure-plate surfaces.
- Install new flywheel bolts when required.
- Follow Honda’s tightening sequence and torque specifications.
- Bleed the clutch hydraulic system properly.
A chromoly flywheel can generally be resurfaced during future clutch service, provided it remains within the manufacturer’s dimensional limits.
Clutch break-in
Follow the instructions supplied with the exact clutch and flywheel. An EXEDY organic clutch typically needs several hundred miles of moderate street operation to establish an even contact pattern.
During break-in:
- Avoid hard launches
- Avoid full-throttle acceleration
- Do not perform dyno pulls
- Stay out of boost, if applicable
- Avoid racing
- Minimize unnecessary clutch slipping
- Use repeated normal engagement cycles
Highway mileage alone provides very few clutch cycles and should not make up the entire break-in period.
Final verdict
This EXEDY clutch and chromoly flywheel package offers a useful balance for K20-powered street cars. The organic disc preserves manageable engagement, while the lighter flywheel makes the engine feel more responsive.
Verified bundle fitment covers the 2002–2006 Acura RSX Type-S and 2006–2008 Honda Civic Si. The KHC10 clutch itself is commonly cataloged through the 2011 Civic Si, but later bundle fitment should not be published until the included flywheel is identified.
Browse additional clutch and drivetrain products at ProStreetOnline or visit the My Pro Street technical library for more K-series guides.
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