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Description
e36 straight cut gears Nissan Silvia 180SX 200SX 240SX CA18 SR20 KA24 RB20 FJ20 FS5W71C Close – Speedtek Auto RacingOur gearsets have been proven across various platforms, and now it's time to support everyone with the small case transmissions typically found in SR20, CA18, KA24, RB20, and RB25DE powered vehicles. This kit includes forks and gears, shafts, dog rings, and hubs. You can retain the factory 5th gear and reverse gears. We offer an option for the 5th and reverse gear, which can be paired with either a heavy duty mainshaft for optimal performance or used
Our gearsets have been proven across various platforms, and now it's time to support everyone with the small case transmissions typically found in SR20, CA18, KA24, RB20, and RB25DE powered vehicles.
This kit includes forks and gears, shafts, dog rings, and hubs. You can retain the factory 5th gear and reverse gears.
We offer an option for the 5th and reverse gear, which can be paired with either a heavy-duty mainshaft for optimal performance or used with the factory mainshaft. The upgraded mainshaft has been enlarged to create a stronger transmission, capable of handling up to 600HP when combined with the enhanced 5th gear.
Ratio's below for the ultimate strength/performance:
Speedtek Auto Racing Straight Cut Gearset.
1-2.69
2-1.69
3- 1.24
4- 1.00
5- OPTIONAL 0.79 (Shorter than stock Ratio but ideal for Racing use)
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 Rapid Quick Shift's, very different to a Factory FS5W71C Synchronized Transmission.
- Optional 5th Gear & Dog Engagement Reverse.
- Optional HD Main Shaft & 4140 Billet Chromoly slip Yoke to suit.
*Please be mindful that:
The SR20 / CA18 & KA24 share the same kit as the Mainshaft length is the same.
The RB20 / RB25DE / RB30E share the same kit as the Mainshaft length is the same.
If you have another engine setup then what's listed, please choose other and provide us with some information on what engine/transmission you have so we can provide you with the right kit.
When choosing the 1-5 Kit with Upgraded Mainshaft & Slip Yoke, you must use the S14 style striking rod for 5th/reverse to make the kit work, we can provide part numbers so you can order this rod and supporting parts if required from your local Nissan Dealership.
- Optional 5th Gear & Dog Engagement Reverse.
- Optional HD Main Shaft & 4140 Billet Chromoly slip Yoke to suit.
*Please be mindful that:
The SR20 / CA18 & KA24 share the same kit as the Mainshaft length is the same.
The RB20 / RB25DE / RB30E share the same kit as the Mainshaft length is the same.
If you have another engine setup then what's listed, please choose other and provide us with some information on what engine/transmission you have so we can provide you with the right kit.
When choosing the 1-5 Kit with Upgraded Mainshaft & Slip Yoke, you must use the S14 style striking rod for 5th/reverse to make the kit work, we can provide part numbers so you can order this rod and supporting parts if required from your local Nissan Dealership.
Our 3rd & 4th gear shift fork is designed around the S14 shift rod. If you're using a different transmission, you can simply redrill the shift fork rod to position the shift rod at the center of 3rd-4th gear, ensuring proper travel and functionality.
(OEM Part# 32808-03U00)
We now offer Isotropic Superfinishing on all our Speedtek Products.
(This process will increase the time from when we could dispatch the kit, please email us if you have any questions)
Superfinishing is a metalworking process that improves surface finish and workpiece geometry. This is achieved by removing just the thin amorphous surface layer left by the last process with an abrasive stone to grind the gears and other parts ; this layer is usually about 1 μm in magnitude. Superfinishing, unlike polishing which produces a mirror finish, creates a cross-hatch pattern on the workpiece.
Advantages of superfinishing include: increasing part life, decreasing wear, closer tolerances, higher load bearing surfaces, better sealing capabilities, and elimination of a break in period.
Our solid 6-month unconditional warranty program for all our manufactured gearsets, you can be confident that your investment is well-protected.
Our extended warranty program is available, for more information : Extended Warranty Program now Available with our Performance Transmiss – Speedtek Auto Racing
We provide installation instructions for all our Dog Engagement Gearsets, please email us for this when you receive your kit.
(OEM Part# 32808-03U00)
We now offer Isotropic Superfinishing on all our Speedtek Products.
(This process will increase the time from when we could dispatch the kit, please email us if you have any questions)
Superfinishing is a metalworking process that improves surface finish and workpiece geometry. This is achieved by removing just the thin amorphous surface layer left by the last process with an abrasive stone to grind the gears and other parts ; this layer is usually about 1 μm in magnitude. Superfinishing, unlike polishing which produces a mirror finish, creates a cross-hatch pattern on the workpiece.
Advantages of superfinishing include: increasing part life, decreasing wear, closer tolerances, higher load bearing surfaces, better sealing capabilities, and elimination of a break in period.
Our solid 6-month unconditional warranty program for all our manufactured gearsets, you can be confident that your investment is well-protected.
Our extended warranty program is available, for more information : Extended Warranty Program now Available with our Performance Transmiss – Speedtek Auto Racing
We provide installation instructions for all our Dog Engagement Gearsets, please email us for this when you receive your kit.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 1219 reviews
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Product Reviews
★★★★★ 5
Great shelves
Color: Light Brown, Size: 4, Color: Light Brown, Size: 4
These are cute and easy to install. They were the perfect size for the location. I did use other drywall mounts to make sure they were more likely to stay in but after I installed they feel sturdy and reliable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 14, 2025
★★★★★ 5
Great Product
Color: Brown, Size: 4
Love them! They’re fairly priced and can hold a lot of weight! Make the space look great!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 25, 2026
★★★★★ 3
Different mounting mechanism than photos
Color: Light Brown, Size: 4, Color: Light Brown, Size: 4
I'm going to start off this review by stating that the mounting mechanism used on the Shelf is different than the one shown in the photo. In the photo, it shows a single bar which would have made the Shelf easier to level however, the product I received has two separate bars which means I have to be extra careful holding a level against the paper. Stencil. The reason I chose this product over different listings was because for a dollar or two more its photo showed a single bar.
Now for the pros and cons:
Pros:
Accurate measurement.
Shelf appears to be actual wood! The photos made it looks like a veneer, which it is not.
Easy to install.
Includes good instructions.
Seems like it can hold items fairly well.
Cons:
The mounting hardware for drywall pretty flimsy, and I stripped out some of the drywall anchors during install. They still worked, but it was annoying to finish inserting them.
The shelf doesn't sit fully flush to the wall from factory as the screws included make it protrude slightly. I can fix this with my dremel, However, This could have been solved from the factory by making the cavity slightly deeper.
As mentioned above in my main detractor, it is a two bar mounting system rather than a one bar, which was shown in the photo.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 21, 2024
★★★★★ 4
Pleased overall
Color: Light Brown, Size: 4
They have an unfinished feel, and the underside screws used to hold the shelf on the poles strip out really easy. Tighten those by hand and with care. Other than that, they look great and were easy to install. Came with a full set of hardware including anchors for various wall types. Stable enough to hold small to medium sized Lego sets (don't try to put Lego Hogwarts size kits on them--not big enough). Bought 3 sets of 4 and used others as Book shelves. They work very well for novel size or paperback sized books. Just make sure you anchor them well into the wall. These will only be as good as the installation.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 4, 2025
★★★★★ 5
Nice and Inexpensive!
Color: Light Brown, Size: 4, Color: Light Brown, Size: 4
Thé shelves are good quality and easy to hang. Thé instructions do leave a bit to be desired as they misidentify which anchor to use for dry wall. I followed instructions for the first shelf and it was not very stable. I switched to the other anchors and it was great. All hardware in included. These require minimum size holes in your wall, but it is a floating shelf so be prepared to patch when you take them down. It’s a set of 4 so a good value!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 22, 2025
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