Action Clutch Stage 3 Clutch Kit (06-11 Civic Si)

Action Clutch Stage 3 Clutch Kit (06-11 Civic Si)

The Action Clutch Stage 3 Clutch Kit (SKU: ACC-CLK-01-91 / ACR-0660) is a single-disc performance clutch built for the 2006–2011 Honda Civic Si (K20Z3, 6-speed manual). If you're hunting for a real Civic Si clutch upgrade and not just a stock replacement, this is the Action Clutch Civic Si kit most people land on first.

It replaces the factory unit with a heavier-hitting, more heat-tolerant setup aimed at aggressively driven street cars, plus cars that see regular autocross, road course work, or occasional drag passes.

How it works and why it exists

The stock Civic Si clutch hangs on fine at factory power, but once you add bolt-ons, a tune, or start clutch-kicking out of corners, slip shows up fast. Heat builds, the engagement gets mushy, and the clutch becomes the first part to tap out.

This Civic Si Stage 3 clutch kit fixes that by pairing a heavy-duty single diaphragm pressure plate with a sprung MIBA ceramic friction disc. Compared to an OEM organic disc, the Sprung MIBA ceramic clutch material bites harder and stays consistent at much higher temps.

The sprung hub calms some of the shock you’d normally send through the drivetrain, so it’s a lot more livable than a solid-hub drag racing clutch Civic setup. Engagement comes on quicker and more decisively than stock, you’ll notice it the first time you pull away. That sharper bite is the whole point of this Performance Clutch Civic Si kit.

Verified specs and materials

• Part number: ACR-0660 / Action Clutch 06-11 Civic
• Vehicle application: 2006–2011 Honda Civic Si, K20Z3, 6-speed manual
• Pressure plate: Heavy-duty single diaphragm with reinforced drive straps
• Clutch disc: Sprung MIBA ceramic friction disc
• Disc configuration: This kit is the 6 Puck Clutch Civic Si version; a 4 Puck Clutch Civic Si option also exists
• Spring design: Fully enclosed spring retainers to help prevent spring ejection at high RPM
• Included components: Pressure plate, clutch disc, release bearing

Action Clutch lists up to a 170% increase in holding capacity versus the factory clutch. There’s no independent torque testing or dyno-verified limit published, so treat that as a ballpark comparison, not a hard cutoff number.

Real world use cases

This Action Clutch Civic Si kit sits firmly in the aggressive street / weekend-warrior category. It’s a solid match for N/A builds with intake, header, exhaust, and a good tune, and it’s a common choice for a Stage 3 Clutch Civic Si setup.

People running this Stage 3 Clutch Kit Civic report noticeably quicker engagement and way better resistance to slip compared to stock. Low-speed chatter is normal at first and usually calms down after a proper break-in.

For mild turbo or supercharged setups, many drivers get acceptable holding power, but like any Heavy-Duty Clutch Civic Si upgrade, success depends heavily on boost level, tuning, tire, and how hard you launch the car.

Fitment and compatibility notes

• Direct bolt-in for 2006–2011 Civic Si with the K20Z3 and 6-speed manual
• Works with the factory flywheel and transmission
• Does not include a lightweight flywheel 
• Break-in is required to reduce chatter and properly mate the friction surfaces, don’t skip it

Trade offs and downsides

This isn’t a comfort-first Civic Si Stage 3 Clutch. Expect a firmer pedal than OEM and a much sharper engagement point. Some low-speed chatter and shudder, especially in parking lots, is normal during the first few hundred miles.

The ceramic disc likes clean, decisive inputs. If you ride the clutch in traffic, it’ll feel harsher than stock and you’ll wear it out faster than you expect.

If you’re chasing big turbo numbers with frequent hard drag launches, any single-disc Stage 3 Clutch Civic Si setup (including this one) will eventually be the limiting factor. At that point, you’re in multi-disc territory.

Who this product is right for

• Civic Si owners with bolt-ons and a tune who need reliable holding power from a Heavy-Duty Clutch Civic Si setup
• Drivers who hit autocross, track days, or spirited canyon runs and want a real Road Racing Clutch Civic feel
• Enthusiasts who prefer a more direct, aggressive engagement over factory-level smoothness

Who should not buy it

• Drivers who want stock-like engagement, low NVH, and light pedal effort from their Action Clutch Kit Civic Si
• Completely stock daily commuters who never track, drag race, or seriously abuse the clutch
• High-horsepower turbo or serious Drag Racing Clutch Civic builds that really belong on a multi-disc setup