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Gear-X Pro Spec II Gear Set - K-series

Gear-X Pro Spec II Gear Set - K-series


Regular price $2,650.00
Sale price $2,650.00
This is an estimated ship date once your order is placed from JHPUSA. Ship dates do not include weekends and holidays.

Gear-X components are absolutely the best of the best, in their line of products. The value is incredible and the materials, machining and quality of these gears and final drives is unsurpassed. You won't find a better quality product for the price anywhere. Manufactured from the finest forged chromoly steel and machined to exact tolerances, these gears will out perform and outlast any competing brands on the market. Designed for racing, tested and sold by racers!

The Gear-X Close Ratio Gear Set for the K-Series engine is designed as a drop-in replacement kit for up to 500hp.

Suitable for street and race K20 or K24 where very close ratio applications are required, such sprints, hill climbs, road race and drag race. Works well with a factory final drive, but is a spectacular performer when used with a 5.08 final drive. When a 5.46 final drive is used with this gear set, it is designed for very short-course racing or fast, short, autocross courses. It is not suggested using the 5.84 or 6.33 final drives with this close-ratio gearset.

Gear Ratios

  • 1st: 2.313
  • 2nd: 1.650
  • 3rd: 1.304
  • 4th: 1.080
  • 5th: 0.958
  • 6th: 0.851


  • Custom Main Shaft
  • 4 Custom Main Shaft Gears
  • 6 Custom Counter Shaft Gears

Vehicle/Transmission applications: 02-05 Civic Si, 02-06 RSX base and Type-S.

Note: Recommend the use of GXSYN-118 carbon synchro kit for all gearboxes- 02-04 or JDM 05-06 or 07-11 Civic Si.


      We realize that returns and exchanges are a part of the purchasing process and we do our best to make it as easy as possible. If you are not 100% satisfied with your purchase, you can return your order to JHPUSA within 14 DAYS from the invoice date.

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