MFactory Infinitude Final Drive - B Series

$624.35 USD
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Achieve the ultimate in acceleration with the INFINITUDE Final Drive Gears. By changing your final gear ratios, you can experience a dramatic increase in acceleration, giving you on average, a 10-15% increase in torque throughout the entire rev-range over the OEM Final Drive.

Diamond Cut to exacting tolerances from Forged High-Nickel-Chromium-Molybdenum Steel with Perfect fitment & finish ensuring hassle-free installation & maintenance, each and every time

Designed using leading-edge Solidworks 3D CAD & Cosmos FEA software leading to Advanced Gear Geometry minimizing parasitic drivetrain losses. Race transmissions built with INFINITUDE components transfer, on average, 1-2% more power to the ground over our competitors!


  • Made from imported Japanese SAE 8620 Steel
  • Forged, Double Tempered and Super Sub-Zero treated for unsurpassed toughness
  • Advanced Shot Peening technology increases surface hardness
  • Advanced gear geometry designed using industry-leading software puts more power to the ground

Fitment Notes
Not Suitable for "cable" boxes incl Y1/S1/J1
YS1 boxes use Small diff B16 fitment.
B Series Hydro small diff fitments: Will not fit models equipped with Factory LSD
Honda '98 Spec Fitments: Designed for the '98 Spec Integra Type-R with Factory 4.785 Final Drive