Clutch Masters Honda K-Series Internal Hydraulic Release Bearing - N818-H

The Clutch Masters Honda K-Series Internal Hydraulic Release Bearing (N818-H) is a high-performance hydraulic throwout bearing engineered specifically for Honda K-powered vehicles — including the Honda Civic Si, Acura RSX Type-S, and Acura TSX. Designed to pair with Clutch Masters' demanding 725 Series twin-disc clutch kits, this internal hydraulic release bearing eliminates the conventional clutch fork and mechanical throwout bearing assembly, replacing them with a cleaner, more consistent hydraulic actuation system. If you're building a performance K-Series drivetrain and want smoother engagement and fewer wear-prone mechanical links in your clutch system, the N818-H is the purpose-built solution.

Key Features & Benefits

• Replaces the Factory Clutch Fork and Throwout Bearing: The N818-H eliminates multiple mechanical components — the clutch fork, release bearing, and pivot ball — reducing the number of moving and wearing parts in your drivetrain. Fewer components means fewer potential failure points, especially under high-performance use.
• Designed for the Clutch Masters 725 Series Twin-Disc Kits: This bearing is engineered to work specifically with Clutch Masters' 725 Series twin-disc clutch systems for the K-Series platform, ensuring proper diaphragm spring engagement, correct air gap, and optimal clamp load transfer.
• Hard Anodized Aluminum Housing and Piston: The housing and piston are constructed from hard anodized aluminum, providing a lightweight yet durable structure that resists wear and corrosion in the demanding environment inside the bellhousing.
• High-Speed Roller Bearing: A precision high-speed roller bearing handles the rotational interface with the clutch disc assembly, delivering consistent, low-friction release actuation lap after lap or shift after shift.
• Steel Braided Hydraulic Lines Included: The kit comes with steel braided lines for hydraulic actuation, providing durability and resistance to expansion under pressure — important for a consistent, predictable pedal feel.
• Softer, More Consistent Pedal Feel: Because hydraulic pressure is used to actuate the clutch rather than a mechanical fork and cable/rod linkage, pedal effort is reduced and engagement becomes smoother and more consistent — a real advantage on track or in spirited street driving.
• Reduced Drivetrain Shock: The hydraulic actuation system helps moderate the abruptness of clutch engagement, reducing shock to the drivetrain during aggressive launches or fast shifts.
• Fully Rebuildable: The N818-H is completely rebuildable. A separate rebuild kit is available through Clutch Masters, meaning this is a long-term investment rather than a single-use part.
• Installation Guidance Available: Clutch Masters provides dedicated installation instructions covering how to correctly set the air gap and shim the bearing, available through their instructions library.

Specifications

• Part Number (MPN): N818-H
• SKU: CLMN818-H
• Brand: Clutch Masters
• Housing / Piston Material: Hard Anodized Aluminum
• Bearing Type: High-Speed Roller Bearing
• Lines: Steel Braided
• Weight: 5.0 lbs.
• Package Dimensions: 16.0" W × 16.0" H × 4.0" L
• Condition: New
• Rebuildable: Yes (rebuild kit sold separately)

Fitment

The Clutch Masters N818-H internal hydraulic release bearing is confirmed to fit the following Honda K-Series applications:

• Acura RSX 2002–2006 — 2.0L Type-S, 6-Speed
• Acura TSX 2004–2008 — 2.4L
• Acura TSX 2009–2014 — 2.4L, 6-Speed
• Honda Civic Si 2002–2005 — 2.0L Si, 5-Speed
• Honda Civic Si 2006–2011 — 2.0L Si, 6-Speed
• Honda Civic Si 2012–2015 — 2.4L Si, 6-Speed

Important: This bearing is designed to work specifically with the Clutch Masters 725 Series twin-disc clutch kits. Verify that your clutch kit is compatible before ordering. If you're unsure whether the N818-H fits your specific build, contact our fitment specialists before purchasing.

What's in the Box

• 1× Clutch Masters N818-H Internal Hydraulic Release Bearing Assembly
• Hard Anodized Aluminum Housing and Piston
• High-Speed Roller Bearing
• Steel Braided Hydraulic Lines

Note: The rebuild kit is sold separately through Clutch Masters. Installation hardware and shimming components may require additional purchase depending on your application — refer to Clutch Masters' installation instructions for details.

Why Buy from ThreePiece.us

ThreePiece.us has been serving performance enthusiasts since 2014, with over 10,000 customers who've trusted our team for fitment expertise and product selection. When you order the Clutch Masters N818-H from ThreePiece.us, you get:

• Free Shipping: Every order ships free — no minimum threshold, no hidden freight charges.
• Affirm Financing: Break your purchase into manageable payments with financing available through Affirm, so you can get your build moving without waiting.
• Expert Fitment Support: Not sure if this bearing works with your specific clutch kit or transmission setup? Our team is reachable at 813-535-5801 and can help you confirm compatibility before you buy.
• Readily Available Stock: The N818-H is a regularly stocked product at ThreePiece.us, so you're not waiting on a long special-order timeline for this part.

Frequently Asked Questions

What does the Clutch Masters N818-H replace, exactly?

The N818-H internal hydraulic release bearing is designed to replace the factory clutch fork, throwout bearing, and pivot ball in Honda K-Series applications. Rather than using a mechanical fork to push the throwout bearing into the diaphragm spring fingers, hydraulic pressure from your clutch master cylinder actuates the bearing directly. This reduces the number of mechanical components in the system.

Is the N818-H compatible with any K-Series clutch kit, or only Clutch Masters kits?

According to Clutch Masters, the N818-H is designed to work specifically with their 725 Series twin-disc clutch kits for the Honda K-Series. It is not stated to be a universal fit for all K-Series clutch kits. If you're running a different clutch system, contact us before ordering to confirm compatibility.

Does this hydraulic release bearing require any special installation steps?

Yes. Clutch Masters notes that correct installation requires properly setting the air gap and shimming the bearing as needed. Clutch Masters provides dedicated installation instructions in their instructions library to walk through this process. We recommend reviewing those instructions carefully or consulting a qualified performance shop familiar with K-Series drivetrain builds.

Can the N818-H be rebuilt if it wears out?

Yes — the Clutch Masters N818-H is fully rebuildable. A rebuild kit is available separately through Clutch Masters, making this a durable, long-term component for your K-Series performance build rather than a throwaway part.