Close Ratio Gear Kit for Nissan S14 Silvia 5-Speed w/Input & Main Shaft


Regular price $3,380.00 Save $-3,380.00
2 in stock

    We carefully research each engine and intended racing application to formulate the most suitable gear ratios to maximize the engine’s potential. The gears are intended to keep the engine operating at its peak optimal power-band thus allowing the vehicle to continue to accelerate as efficiently as possible


    Each gear component is designed and created from high-quality forged materials, and then undergoes hard shot peening, resulting in increased strength and durability.


    Our gears are helical-cut rather than straight-cut in order to maintain a quiet operation as well as increased reliability for racing.

The Nissan Silvia (S14) SR20DET Close Ratio Gear Kit comes with stronger reinforced main and input shaft to replace the OEM units. The provided gear ratios are as listed: 

1st: 2.596

2nd: 1.765

3rd: 1.250

4th: 1.000

5th: 0.833

The “Pre-Order” order option is enabled when the listed item is either temporarily out of stock, or is only available as a “built to order” item from our factory.

Once an order for a “Pre-Order” item is received, we will confirm lead-time with our Japan factory and contact you within 1-2 business days via email with current projected production lead-time information and delivery date projections. After accepted/authorized we will proceed with finalizing your order. If the quoted lead-time is not accepted, the order will be promptly cancelled and you will be refunded immediately in full.  

If there is further delay after your placed order, we will contact you with an updated delivery lead-time or provide you with the option to cancel with a full refund for any unfulfilled order items.

While there is no risk in ordering “Pre-Order” items through our website, feel free to contact us ahead of time regarding product leadtime.

California Prop 65 Warning

*Warning: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to: