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- USA
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Ships within 48 hours · Estimated delivery Jul 7 - Jul 12
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Description
gear engagement 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
4.3 ★★★★★
Based on 329 reviews
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Product Reviews
★★★★★ 4
Heavy linen character, but a beautifully tailored suit!
Color: Beige, Size: 4, Color: Beige, Size: 4
This is a really nice linen suit! The jacket is beautifully made and well-tailored, with a fun speckled texture that has lots of pretty color variation (we ordered the beige). When I placed it side by side with a similar linen suit from another brand, the difference in the linen texture was really noticeable — this had a much stronger linen character that stands out!
It has three useful pockets on the outside of the jacket, which is great for little hands. The only downside is that one of the inside pockets is just for show (faux), which was a bit surprising and somewhat disappointing for my little guy.
The pants have pockets too, but they aren’t very deep — perfect for small treasures, but not much more. The pants are made from a lighter, thinner single-layer linen compared to the fully lined, double-layer jacket, which makes sense for comfort and easy movement.
The pants didn’t come with a front crease ironed in, so you’ll want to press one yourself. The linen did pick up some creases from being folded in the package, but it doesn’t seem quite as wrinkly as some other linen fabrics I’ve tried. Still, like most linen clothes, especially for boys, the pants will need occasional ironing to keep them looking neat and crisp, especially after a day of play and general wear. The structured, lined jacket stays looking smoother and more put-together with less effort.
It also came with a bow tie, a neck tie, and a tuxedo-style white shirt as extras. The ties aren’t great quality — they’d work fine for quick photos but probably won’t hold up to much actual wear. The formal white shirt feels a bit funny paired with the casual linen suit, but I don’t mind at all. We already have white shirts that we prefer, so we’ll use those instead. For us, the extras are really just bonus items we won’t plan on using.
Overall, it’s a handsome little suit that’s perfect for special occasions like weddings, family photos, or holiday events. My kid looked adorable in it! The stronger linen texture on the jacket gives it a premium feel that I really like. Just be ready for a bit of extra care with the pants to keep everything sharp.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026
★★★★★ 5
Great suit set
Color: Light Grey, Size: 4
It is incredibly attractive and includes everything a young child needs for a special occasion.
The material is a 75% polyester and 25% linen blend, and the outer fabric feels remarkably smooth. Its unstructured design allows for an attractive, natural drape, and the blend conveniently allows for machine washing at home.
As is typical with linen-based materials, the fabric can be naturally stiff and prone to wrinkling, so I recommend ironing or steaming it before use. The lightweight feel makes it an excellent choice for the spring, summer, and fall months.
Overall, this suit offers exceptional value for the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 12, 2026
★★★★★ 5
A good First Communion suit
Size: 6, Color: White, Size: 6, Color: White
This suit looks and feels really nice even though it’s not 100% linen. My son is an average size 7 year old, but I got a size 6 so that the fit would be nice and snug and not loose and baggy. It was the right choice. Comes with a bow tie which is nice, a tie (which is very cheap and poorly made) and a pocket square.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2026
★★★★★ 5
Very stylish💜💜
Size: 6, Color: Light Blue, Size: 6, Color: Light Blue
This little suit for boys is very stylish. I bought it for my grandson for a wedding occasion and it looked very nice. The fabric is not too thick so for the summer wedding it was great. I pick the blue color and it looked fantastic!
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Reviewed in the United States on March 16, 2026
★★★★★ 5
Loved it
Fit perfectly
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 9, 2025
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