Competition Clutch D-Series Stage 4 Clutch Kit for Honda Civic

Rigid (0620) vs. Sprung (1620): Why It Matters

Competition Clutch offers the Stage 4 for the D-series in two disc configurations. Both use the same pressure plate, same ceramic friction material, same 250% torque capacity increase, and same 6-puck layout. The difference is entirely in the disc hub, and that difference changes how the clutch feels dramatically.

The rigid disc eliminates the spring assembly entirely. That makes it lighter, which means the synchros in your transmission can match shaft speed faster during shifts. Faster shifts. That's the upside. The downside is that every time you engage the clutch, the ceramic pads grab the flywheel with zero cushion. There's no gradual take-up, no progressive engagement zone. It either grabs or it doesn't. People describe it as a light switch, and that's accurate.

In a race car, this is exactly what you want. You dump the clutch at the line, bang through gears as fast as possible, and the clutch either holds or it doesn't. Comfort doesn't matter. Shift speed does. On a street car in stop-and-go traffic, this same behavior means stalling at lights, lurching through parking lots, constant low-RPM chatter, and significantly more wear on your transmission internals. The springs in the 1620 disc exist specifically to absorb the engagement shock that would otherwise hammer your synchros and thrust bearings every single shift.

If there's any chance this car sees regular street driving, buy the sprung version (8022-1620). It holds the same power. It uses the same pressure plate. It costs less wear and tear on your transmission. The only thing you give up is a small amount of shift speed and disc weight, neither of which matters on the street.

Who This Kit Is Actually For

This kit makes sense in a narrow set of builds:

Turbo D-series drag cars. You're running a built D16 or D15 on a big turbo making 300+ whp, the car lives at the strip, and you want the fastest possible shifts with maximum holding power. The lighter rigid disc complements the aggressive engagement you need for consistent launches, and you're not worried about transmission longevity because you rebuild between seasons anyway.

Time attack or road course builds. You need maximum torque capacity and the fastest shifts you can get through a 20-minute session. The rigid disc's lighter weight helps the engine rev quicker between shifts, and the immediate engagement means zero power loss during gear changes. Chatter and comfort are irrelevant when you're on the clock.

Budget race builds where a twin disc isn't in the cards. A Competition Clutch twin disc holds more power and actually drives better on the street than a single rigid 6-puck, but it also costs significantly more. If you need race-level holding power on a single-disc budget, the 0620 gets you there.

Don't buy this for a street car. Even if you "don't mind" harsh engagement, the rigid disc accelerates wear on your transmission synchros, thrust bearings, and axles every time you shift. On D-series transmissions (which aren't exactly known for being bulletproof), that's asking for trouble. The sprung disc absorbs that shock. At the same power level and the same torque capacity, the sprung version protects your drivetrain better for street use.

Power Threshold: Do You Actually Need a Stage 4?

The stock D-series clutch handles roughly 100-130 ft-lbs of torque depending on the engine. A 250% increase puts the Stage 4's holding capacity somewhere around 350+ ft-lbs, which covers builds well into the 300-400+ whp range on a turbocharged D-series.

If you're under 300 whp, you're overbuying. A Stage 3 full-face ceramic holds 150% more torque than stock, drives significantly better, and won't beat up your transmission. The only reason to step up to a Stage 4 is because a Stage 3 is slipping under boost, or you're building for a power level where it will.

What's in the Kit

• Competition Clutch Performance Pressure Plate
  1,500 lb clamping force. This is the same pressure plate used in the sprung (1620) version. Expect a noticeably heavier clutch pedal than stock. On hydraulic D-series cars, the hydraulic assist takes some edge off compared to cable-clutch applications, but you'll still feel the difference.
• 6-Puck Rigid Ceramic Disc (0620 Series)
  Six ceramic friction pads (12 total, both sides) on a solid, unsprung hub. No springs, no dampening, no progressive engagement. The ceramic material handles extreme heat well, which matters during sustained use at the track. The rigid hub is lighter than the sprung version, allowing faster shifts.
• Throw-Out Bearing (Release Bearing)
  Included. Always replace with a clutch swap. The 1,500 lb pressure plate puts more load on the TOB than stock.
• Pilot Bearing
  Included. Replace it every time. Cheap part, expensive labor to get to later.
• Alignment Tool
  For centering the disc on the flywheel during installation.

Flywheel is not included. If you're pulling the transmission for a clutch swap, replace or resurface the flywheel at the same time. For race applications with this rigid disc, the Competition Clutch ultra-lightweight flywheel (2-702-STU, 8.8 lbs) is the typical pairing. The lighter flywheel and lighter rigid disc together minimize rotational mass for the fastest possible revving and shifting. For a less aggressive setup, the CC lightweight (2-702-ST, 11.44 lbs) works fine.

What It's Actually Like to Drive

The D-series community has been running rigid 6-puck setups in turbo builds for years. Here's what you're signing up for:

Engagement is binary. There's no feathering a rigid 6-puck. The clutch is either engaged or it's not. You'll find a very narrow RPM window (a few hundred RPM) where the clutch engages cleanly from a stop. Below that, you stall. Above that, you lurch or chirp the tires. With practice, you'll calibrate your foot to that window, but it takes real concentration in traffic. One D-series builder described it as "needing to drive the car, not just sit in it."

Chatter is constant at low RPM. First and second gear at low speed will vibrate and rattle. This is normal for a rigid puck clutch. It's the ceramic pads contacting the flywheel surface without any spring dampening to smooth out the engagement pulses. It sounds worse than it is mechanically, but passengers will notice, and it never fully goes away.

Shifts are fast. This is the actual reason to buy a rigid disc. The lighter hub means your transmission's synchros can match shaft speed faster when you shift. Combined with the immediate engagement, gear changes happen quicker. On a drag car banging through gears at 8,000+ RPM, this translates to measurably faster runs. On the street at 3,500 RPM, you won't notice a difference from the sprung version.

Your transmission takes a beating. Without springs to absorb engagement shock, every shift sends the full impact directly into the input shaft, synchros, and thrust bearings. D-series transmissions (S20, S40, S80, Y8) aren't built for this kind of abuse over tens of thousands of miles. On a race car that gets refreshed regularly, it doesn't matter. On a car you drive 15,000 miles a year in city traffic, you're shortening your transmission's life. The community consensus is clear: unsprung discs on D-series are fine for race cars where you replace the trans between seasons, and a bad idea for daily drivers.

Break-in takes 300 miles. Drive gently. No hard launches, no aggressive shifts, no slipping the clutch. The ceramic pads need to bed into the flywheel. During break-in, the engagement will be especially harsh and inconsistent. It improves after the pads seat, but it never gets "smooth" in the way a full-face disc does.

Vehicle Fitment

The 8022 prefix designates D-series hydraulic clutch applications. This fits 1992-2005 Civic and 1993-1997 del Sol models with D15, D16, or D17 engines and factory hydraulic clutch systems.

Hybrid Racing SKU: COC-8022-0620
Manufacturer Part Number: 8022-0620
Series: Stage 4, Strip Series 0620 (Rigid/Unsprung)
Disc: 6-puck rigid ceramic, solid hub, 12 ceramic friction pads
Disc Size: 212mm x 7/8" x 20 spline
Pressure Plate Load: 1,500 lbs
Torque Capacity: Up to 250% increase over stock
Break-In: 300 miles minimum
Flywheel: Not included. Sold separately.
Warranty: 90 days from retail purchase through authorized dealer

This Kit Does NOT Fit

Despite what some fitment databases show, the 8022-0620 is exclusively for hydraulic D-series applications (1992-2005). It does not fit:

• 1988-1991 Civic or CRX (EF chassis): These use cable clutch actuation. You need the 8012 prefix for cable D-series applications.
• 2006-2011 Civic (8th gen): R18A or K20Z3 engine. Completely different clutch assembly.
• 2012+ Civic (9th, 10th, 11th gen): Different engines, different clutch. Not compatible.
• FK8 or FL5 Civic Type R: K20C1 engine. Different clutch assembly entirely.
• Any B-series, K-series, or H-series swap: The clutch kit matches the transmission, not the chassis. If you've swapped in a non-D-series engine with its own transmission, you need the clutch kit that matches your swap trans.

Installation Notes

• Replace or resurface the flywheel. A glazed, heat-checked, or warped flywheel will prevent the ceramic pads from bedding properly and cause uneven engagement. If you're reusing the stock flywheel, have a machine shop resurface it before reinstalling. For race builds, pair this with the Competition Clutch ultra-lightweight flywheel (2-702-STU).
• Replace the throw-out bearing and pilot bearing every time. Both are included in this kit. The 1,500 lb pressure plate puts significantly more load on the TOB than stock. Don't gamble on reusing the old one.
• Check the rear main seal. Oil on the clutch friction surface causes slipping regardless of clamping force. Fix any leaks before installing a new clutch.
• Bleed the hydraulic system thoroughly. Air in the hydraulic line will make the engagement point inconsistent, which is already touchy on a rigid 6-puck. Fresh fluid, full bleed, no air bubbles.
• 300-mile break-in is mandatory. Drive gently. Let the pads seat into the flywheel surface. The clutch will feel terrible during break-in. It doesn't get "good" afterward, but it does get consistent, which is what you need for repeatable launches.
• Inspect your axles. The immediate engagement of a rigid disc sends shock loads through the drivetrain that a full-face or sprung disc would absorb. On turbocharged D-series builds making 300+ whp, stock axles are a weak point. Budget for upgraded axles if you're launching hard.

Common Questions

What's the difference between this (8022-0620) and the 8022-1620?
The disc. The 0620 has a rigid (unsprung) hub with no dampening springs. The 1620 has a sprung hub that cushions engagement. Both hold the same power. The rigid is lighter and shifts faster. The sprung is more livable and easier on your transmission. Same pressure plate in both kits.

Can I daily drive this?
Technically, yes. People have done it. But the community consensus on D-series forums is clear: unsprung 6-puck clutches on D-series transmissions are a bad combination for daily driving. The lack of dampening accelerates wear on synchros and thrust bearings. You'll stall more in traffic. First gear will chatter constantly. If this is your only car, get the sprung version (8022-1620). It holds the same power.

I have a 1988-1991 EF Civic or CRX. Will this fit?
No. The EF chassis uses cable clutch actuation, not hydraulic. You need the 8012 prefix. The 8012-0620 would be the rigid Stage 4 for cable D-series, and the 8012-1620 would be the sprung version.

I'm doing a B-series or K-series swap in my Civic. Will this work?
No. The clutch kit matches the transmission, not the car. If you've swapped in a B-series with a hydraulic B-series trans, you need the 8026 prefix. K-series swaps use completely different clutch assemblies (8037 prefix at Competition Clutch).

Is the Stage 5 (4-puck) even more aggressive than this?
Yes. The Stage 5 (1420 series) uses a 4-puck sprung disc. Fewer pucks means less friction surface area, which creates even more aggressive engagement per pad. It holds up to 300% more torque. It's also harder on clutch disc longevity because fewer pads share the load. For most D-series turbo builds, the 6-puck Stage 4 is the better balance of holding power and disc life.

Should I go straight to a twin disc instead?
If your budget allows it and you're making 350+ whp, a twin disc is genuinely the better option. Competition Clutch's D-series twin disc actually drives more smoothly on the street than this single rigid 6-puck while holding more power. The twin disc uses two smaller, lighter discs with more total friction surface, which means each disc takes less abuse per shift. The trade-off is cost.

Who Should Buy This (And Who Shouldn't)

Buy this if: Your turbo D-series makes 300+ whp. The car is a dedicated drag, track, or time attack build. You prioritize shift speed and want the lightest possible clutch disc. You're comfortable rebuilding or replacing a D-series transmission periodically. You don't care about chatter, noise, or comfort because the car doesn't see traffic.

Buy the sprung version (8022-1620) instead if: You make the same power but drive the car on the street. You want the same holding capacity without beating up your transmission. You're not chasing tenths at the strip where shift speed matters.

Buy a Stage 3 instead if: Your build is under 300 whp. The Stage 3 segmented ceramic full-face (8022-2600) holds 150% more torque, drives significantly closer to stock, and won't chatter or rattle. For the vast majority of turbo D-series builds, it's the right choice.

Don't buy any Stage 4 if: Your car is stock or naturally aspirated with bolt-ons. The stock clutch handles NA power fine. Putting a 6-puck ceramic on a 100 hp D15 is all pain and zero gain.