Speedtek=Nissan Silvia 180SX SR20 KA24 RB20 FJ20 FS5W71C Close Ratio Gearset
Speedtek=Nissan Silvia 180SX SR20 KA24 RB20 FJ20 FS5W71C Close Ratio Gearset
Speedtek=Nissan Silvia 180SX SR20 KA24 RB20 FJ20 FS5W71C Close Ratio Gearset
Speedtek=Nissan Silvia 180SX SR20 KA24 RB20 FJ20 FS5W71C Close Ratio Gearset
Speedtek=Nissan Silvia 180SX SR20 KA24 RB20 FJ20 FS5W71C Close Ratio Gearset
Speedtek=Nissan Silvia 180SX SR20 KA24 RB20 FJ20 FS5W71C Close Ratio Gearset
Speedtek=Nissan Silvia 180SX SR20 KA24 RB20 FJ20 FS5W71C Close Ratio Gearset
Speedtek=Nissan Silvia 180SX SR20 KA24 RB20 FJ20 FS5W71C Close Ratio Gearset
Speedtek=Nissan Silvia 180SX SR20 KA24 RB20 FJ20 FS5W71C Close Ratio Gearset
Speedtek=Nissan Silvia 180SX SR20 KA24 RB20 FJ20 FS5W71C Close Ratio Gearset

Speedtek Auto Racing

Speedtek=Nissan Silvia 180SX SR20 KA24 RB20 FJ20 FS5W71C Close Ratio Gearset

  • Sale
  • $2,200.00
  • $2,499.00

Nissan Silvia 180SX, 200SX, 240SX CA18, SR20, KA24, RB20, FJ20 Close Ratio Synchronized Gearset.

Designed to handle up to 400HP across most applications.

Our gearsets have demonstrated their reliability across various platforms. Now, we're extending this support to the small case transmissions typically found in vehicles powered by the SR20, CA18, KA24, RB20, and RB25DE engines.

Ratio's below for the ultimate strength/performance:

Speedtek Auto Racing Synchronized Helical Cut Gearset

1-3.201
2-1.725
3- 1.264
4- 1.00
5- OPTIONAL 0.677 (Much longer than stock Ratio but ideal for Road use to lower RPM on the Highway)

S13 SR20DET & KA24 Ratio's. (180sx JDM /240SX - USDM)
1- 3.321
2- 1.902
3- 1.308
4- 1.000
5- 0.759

Be mindful these are intended for vehicles that still want to be street driven and not exceed 400HP. These kits are much stronger than standard gears, we use only premium quality materials, and our tooth profiles are much thicker then stock.

Limited stock is available, but we are constantly making them, if we do not have stock, lead time is around 6 weeks.

These utilize synchro rings which are single piece throughout, you may need to verify with your transmission builder which synchro rings/sleeves you have and then possibly change them to single piece, we have gone with this route as they are much easier to find then multipiece synchros and we have found they work well for street use.

1st & 2nd Gear Synchro Ring Size 67mm (approx)
3rd/4th Gear Synchro Ring size 60mm (approx)
5th Gear Synchro Ring Size 52mm (approx)

This gearset requires specific Shift HUB & Sleeve in 3rd-4th & Fork to suit. If you are not certain on what you currently have in your transmission, we would suggest you order these through us during check out.

3rd-4th Hub : (to be listed)

Fork : Replacement HD Cast Shift Fork suit 3rd & 4th Gear - 71 Series Transmi – Speedtek Auto Racing

* 200SX 240SX CA18

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