Which cars does the Reinforced Sync Hub Set, 3-Piece for GZEA14H fit?

Cusco USA lists part number 1C7 028 CB for the Toyota GR Corolla (GZEA14H, 2023-2026) and the Toyota GR Yaris (GXPA16, 2020-2025). The Reinforced Sync Hub Set, 3-Piece for GZEA14H fits inside the factory six-speed gearbox, so the gearbox has to come out and be stripped to fit it.

Why replace the factory sync hubs?

The hubs take the load of every shift and every launch. On a car with more power than stock, or one that is launched and shifted hard on track, the factory hubs are the parts most likely to crack or wear. Reinforced hubs add strength without changing the ratios or the way the gearbox shifts.

Do the gear ratios change?

No. Only the hubs are replaced, so every gear ratio, the final drive and the shift pattern stay exactly as they were from the factory. The car drives the same, with more strength in the parts that carry the shift loads. Close-ratio gears are a separate upgrade.

Should I choose the two-piece or the three-piece set?

The two-piece set covers 1st/2nd and 3rd/4th, the gears that take the hardest launches and shifts. The three-piece set adds the 5th/6th hub, which makes sense when the gearbox is already apart, on high-power cars, and on cars that see sustained high-speed track use.

A transmission specialist. The gearbox has to come out of the car and be stripped down to the shafts, and the synchronizer rings, sleeves and bearings should be inspected and replaced where worn while it is open. It is efficient to plan the job with a clutch or differential upgrade.

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Description

Cusco Reinforced Sync Hub Set, 3-Piece for GZEA14H Toyota GR Corolla and GXPA16 Toyota GR Yaris

Cusco’s Reinforced Sync Hub Set, 3-Piece for GZEA14H Toyota GR Corolla and GXPA16 Toyota GR Yaris replaces the factory synchronizer hubs for the 1st/2nd, 3rd/4th and 5th/6th gear pairs in the six-speed manual gearbox with stronger parts. Cusco describes the set as a direct replacement for the factory hubs that needs no other parts. It suits a GR Corolla or GR Yaris with more torque than stock, or one that sees hard launches and fast shifts on track, where the factory hubs are a known weak point.

Design and Performance

A synchronizer hub carries the sleeve that slides across to lock each gear to its shaft, so every shift and every launch loads it. When the engine makes more torque than stock, or the car is shifted hard and fast at high rpm, a factory hub can crack or wear its splines. The Reinforced Sync Hub Set, 3-Piece for GZEA14H uses reinforced hubs in the same locations, so the gearbox keeps its factory ratios and shift pattern with more strength where it is most needed.

Features

Reinforced synchronizer hubs for 1st/2nd, 3rd/4th and 5th/6th
Set of 3 hubs
Direct replacement for the factory hubs
No extra parts needed, per Cusco
Factory gear ratios and shift pattern retained

Specifications

Cusco part number: 1C7 028 CB
Type: Reinforced transmission sync hub set
Pieces: 3
Gear pairs covered: 1st/2nd, 3rd/4th, 5th/6th
Fitment type: Direct OE replacement
Position: Six-speed manual transmission

Applications

Toyota GR Yaris: GXPA16 | 2020-2025 | RZ / RC AWD Model
Toyota GR Corolla: GZEA14H | 2023-2026 | 1.6L 3-Cylinder Turbo (G16E-GTS)

Notes

Fitting means removing and stripping the gearbox; it is a job for a transmission specialist, and installation labor is not included
Cusco states no extra parts are needed to use this set
A two-piece set covering 1st/2nd and 3rd/4th only is sold as Cusco part 1C7 028 CA

Frequently Asked Questions

Which cars does the Reinforced Sync Hub Set, 3-Piece for GZEA14H fit? Cusco USA lists part number 1C7 028 CB for the Toyota GR Corolla (GZEA14H, 2023-2026) and the Toyota GR Yaris (GXPA16, 2020-2025). The Reinforced Sync Hub Set, 3-Piece for GZEA14H fits inside the factory six-speed gearbox, so the gearbox has to come out and be stripped to fit it.
Why replace the factory sync hubs? The hubs take the load of every shift and every launch. On a car with more power than stock, or one that is launched and shifted hard on track, the factory hubs are the parts most likely to crack or wear. Reinforced hubs add strength without changing the ratios or the way the gearbox shifts.
Do the gear ratios change? No. Only the hubs are replaced, so every gear ratio, the final drive and the shift pattern stay exactly as they were from the factory. The car drives the same, with more strength in the parts that carry the shift loads. Close-ratio gears are a separate upgrade.
Should I choose the two-piece or the three-piece set? The two-piece set covers 1st/2nd and 3rd/4th, the gears that take the hardest launches and shifts. The three-piece set adds the 5th/6th hub, which makes sense when the gearbox is already apart, on high-power cars, and on cars that see sustained high-speed track use.
Who should fit it? A transmission specialist. The gearbox has to come out of the car and be stripped down to the shafts, and the synchronizer rings, sleeves and bearings should be inspected and replaced where worn while it is open. It is efficient to plan the job with a clutch or differential upgrade.

About CUSCO

CUSCO is the brand of Carrosser Co., Ltd., founded in December 1977 and based in Takasaki, Gunma Prefecture, Japan. Carrosser designs and builds coilovers, limited-slip differentials, clutches, roll cages and chassis parts, sells its steel cages under the Safety 21 name, and competes in every All Japan Championship category from circuit racing to rally and gymkhana. CUSCO USA, a division of Carrosser, is based in Huntington Beach, California.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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Cusco Reinforced Sync Hub Set, 3-Piece for GZEA14H Toyota GR Corolla and GXPA16 Toyota GR Yaris [1C7 028 CB]

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Cusco Reinforced Sync Hub Set, 3-Piece for GZEA14H Toyota GR Corolla and GXPA16 Toyota GR Yaris

Design and Performance

Features

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Frequently Asked Questions

About CUSCO

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