MFactory Final Drive Gears | Honda Civic Type-R EP3 FN2 Integra DC5 K20A
Product Overview
Unlock the ultimate acceleration potential of your K-Series transmission. While adding horsepower under the hood is great, changing your mechanical leverage is what truly transforms a car’s responsiveness. The MFactory Final Drive Gears | Honda Civic Type-R EP3 FN2 Integra DC5 K20A are engineered to dramatically alter your transmission’s overall gearing, delivering an average of 10% to 15% effective torque increase across your entire rev range compared to the stock OEM final drive.
Key Features & Benefits
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Massive Acceleration Gains: Shifting to a shorter final drive ratio multiplies engine torque more aggressively, resulting in vastly improved 0–100 km/h and quarter-mile times.
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Forged Nickel-Chromoly Steel: CNC-machined from premium, fully carburized Japanese forged nickel-chromoly steel to withstand immense drivetrain shock loads.
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Advanced Cryo-Tempering: Subjected to a proprietary multi-stage heat treatment and cryogenic tempering process for unsurpassed core toughness and longevity.
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Perfect VTEC Engagement: Optimizes gear spacing drop points, ensuring your engine drops right back into the sweet spot of the VTEC powerband after every upshift.
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Championship-Proven Reliability: Trusted globally on everything from high-horsepower street cars to championship-winning time attack and door-to-door race cars.
Gear Ratio Comparison & Performance Impact
Choosing the right final drive depends entirely on your vehicle’s main purpose (Street, Track, or Drag). Review the performance breakdown below based on a standard K20A baseline:
| Final Drive Option | Effective Torque Gain | Ideal Application |
| 4.00 FD | Longer Gearing | High-horsepower Turbo / Highway Top Speed |
| 5.08 FD | ~18% Increase | Spirited Street / Fast Circuit Track Days |
| 5.417 FD | ~24% Increase | Dedicated Track Day / Time Attack / Tight Circuit |
| 5.84 FD | ~33% Increase | Hillclimb / Tight Sprint Circuits / N/A Drag Race |
| 6.33 FD | ~44% Increase | Extreme Race / Pure N/A Drag Racing (Very Short) |
Technical Specifications
| Feature | Specification |
| Brand | MFactory Competition Products |
| Material Base | Forged High-Tensile Japanese Nickel-Chromoly |
| Processing | Fully Carburized, Cryo-Tempered & Shot-Peened |
| Engine Fitment | Honda K20A / K20A2 / K20Z4 (K-Series Manual Transmissions) |
| Chassis Fitment | Civic Type R (EP3 & FN2), Integra Type R (DC5) |
Why Choose MFactory Over the Stock Honda Final Drive?
The factory 4.7 final drive found in most premium K20A gearboxes is configured as a compromise between fuel economy and sport driving. For true performance enthusiasts, this leaves a lot of speed on the table. When you exit a tight bend on the circuit, a stock-geared EP3 or DC5 can bog down slightly if it drops out of the optimal RPM window.
Applications
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Compatible Gearboxes: Fits Honda 6-speed manual K-Series transmissions found in the JDM Integra DC5 Type R, UKDM/Euro EP3 Civic Type R, and FN2 Civic Type R.
Installation Notes
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Professional Installation Required: Transmission disassembly is necessary. We highly recommend replacing your differential bearings, input shaft bearings, and seals at the same time.
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Fluid Lubrication Notice: MFactory explicitly recommends using premium Torco MTF or equivalent high-performance manual transmission fluids to ensure maximum gear life and smooth synchro operation.
| TYPE | 5.08 FD, 5.417 FD, 5.84 FD, 6.33 FD |
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