The 11 lb Sweet Spot for K-Series Performance

The Competition Clutch 2-800-ST delivers what K20 and K24 enthusiasts actually want: faster revs and sharper throttle response without sacrificing daily drivability. At 11 lbs versus the 16 lb stock flywheel, you get 31% less rotational mass. That's enough to feel the difference immediately without the chatter and stalling headaches of ultra-light 8 lb alternatives.

Built from one-piece 4140 forged steel and CNC machined to OE specifications, this flywheel handles high-heat track sessions and thousands of daily-driven miles. The integrated ring gear eliminates the failure point of OEM two-piece units, and the Blanchard-ground friction surface provides consistent clutch engagement from cold start to hot laps.

Why the K-series community recommends this weight

Benefit	What it means for you
Preserves low-end torque	Smooth takeoffs in traffic. No stalling at lights or lurching through parking lots like you'll get with ultra-light race flywheels.
Faster rev drop	Revs fall quicker between shifts, making heel-toe downshifts feel clean and predictable. Your K20 finally revs like it should.
No drone or chatter at idle	The number-one complaint with aluminum flywheels doesn't exist here. 11 lbs of forged steel keeps things civilized.
SFI 1.5 certified	Meets the requirement for sanctioned track events, HPDE, and time attack. Not just a street piece.
Works with any clutch disc type	Organic, ceramic, and multi-puck setups all engage cleanly on the Blanchard-ground surface.

Best clutch pairings by power level

Power Level	Recommended Clutch	Why
Daily driver / light bolt-ons (under 250 whp)	Exedy Stage 1 organic	Smooth engagement, long disc life, the go-to combo in the K-series community
Spirited street / canyon car (250-350 whp)	Competition Clutch Stage 2	Firmer pedal, holds power without slipping, still streetable
Track-focused / forced induction (350+ whp)	Competition Clutch Stage 3 or Stage 4	Higher clamp load for serious power, pairs well with this flywheel's heat tolerance

Technical Specifications

Specification	Value
Weight	11 lbs (5.0 kg)
Stock flywheel weight	~16 lbs
Weight savings	31% reduction
Material	One-piece 4140 forged steel, precision balanced
Surface finish	Blanchard-ground, ready to install (no machining required)
Ring gear	One-piece integrated, OEM location
Certification	SFI 1.5
Resurfaceable	Yes
MPN	2-800-ST
SKU	COC-2-800ST

Complete Vehicle & Engine Fitment

Vehicle	Years	Chassis Code	Engine
Acura RSX Type-S	2002-2006	DC5	K20A2 ✓
Acura RSX Base	2002-2006	DC5	K20A3 ✓
Honda Civic Si	2002-2005	EP3	K20A3 ✓
Honda Civic Si	2006-2011	FA5 / FG2	K20Z3 ✓
Acura TSX	2004-2008	CL9	K24A2 ✓
Honda Accord	2003-2007	CM1 / CM2	K24A4 ✓
Honda Element	2003-2011	YH1 / YH2	K24A1 ✓
K-swapped vehicles	Any	Any with 6-speed	K20 / K24 ✓

Supported engine codes: K20A2, K20A3, K20Z1, K20Z3, K24A1, K24A2, K24A4, K24A8

Important fitment note: Requires RSX Type-S clutch and pressure plate. Base RSX (K20A3) and EP3 applications use offset dowel pins. Confirm pressure plate compatibility before ordering. If you're unsure, shoot us a message and we'll sort it out.

What's Included

Item	Included
Competition Clutch 2-800-ST Light Steel Flywheel	Yes (1x)
Flywheel bolts (use OEM Honda 90019-PCY-000, torque to 76 ft-lbs)	Not included

Installation Notes

Professional installation recommended. Typical labor time is 4-6 hours. While the transmission is out, it's worth replacing your rear main seal and pilot bearing. You don't want to pull the trans again for a $12 seal. Break in the new clutch and flywheel with 500-700 miles of moderate driving before any aggressive use.

Frequently Asked Questions

How much lighter is this than stock?

The 2-800-ST weighs 11 lbs compared to the OEM RSX Type-S flywheel at roughly 16 lbs. That's a 31% reduction in rotational mass. It's the range where you'll notice significantly faster revs without giving up the smooth idle and easy takeoffs you need for daily driving.

Will this flywheel cause clutch chatter?

At 11 lbs, this sits in the community-proven sweet spot. Ultra-light 8 lb aluminum flywheels are the ones notorious for chatter and rattle at idle. The forged steel construction and moderate weight keep engagement smooth. Most owners report zero chatter issues, even with Stage 2 clutches.

What's the best clutch to pair with it?

For daily driving under 300 whp, the Exedy Stage 1 organic is the most popular pairing in the K-series world. Smooth pedal, long life, and no drama. If you're pushing more power or doing regular track days, the Competition Clutch Stage 2 is the move. Always use an RSX Type-S pressure plate.

Does this work with K24 engines?

Yes. The 2-800-ST fits K24A1, K24A2, K24A4, and K24A8 engines when used with a 6-speed transmission. That covers the TSX, Accord, Element, and K24-swapped cars.

Will a lightweight flywheel throw a check engine light on my 2012+ Civic Si?

On 2012-2015 Civic Si, 2009-2014 TSX, and 2013-2017 Accord models, the sensitive crank position sensor can read lighter flywheel vibration as misfires. The fix is simple: use Hondata FlashPro or KTuner to disable the misfire detection threshold. This is a well-known tuning step for any lightweight flywheel on these platforms.

What's the break-in procedure?

Competition Clutch recommends 500-700 miles of easy driving before you start beating on it. No hard launches, no high-RPM clutch dumps, no aggressive rev-matching during that window. After break-in, clutch feel smooths out noticeably and you're good to go.

If you're building a responsive street car, a track toy, or a dual-duty K car, this is the flywheel that splits the difference perfectly. Way quicker to rev than stock, far tougher than most aluminum options, and still completely livable in traffic. We run this exact setup on our own K-swapped project cars for that reason.

2002-2006 Acura RSX Base & Type-S
2002-2005 Civic Si
2006-2011 Honda Civic Si & Type R

Hybrid Racing Civic Si EP3 Shifter & Mount Upgrade

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