How much more does the HD EXEDY Stage 2 Cerametallic Clutch hold on an FD?

EXEDY rates the 10953HD at 405 lb-ft of torque capacity at the wheels against 320 lb-ft for the standard 10953, because clamp load rises from 2,093 lb to 2,653 lb. Flywheel torque moves from 400 to 506 lb-ft, with the same disc and spline.

Who needs the HD FD clutch?

An FD with a large single turbo, high boost or ethanol fuel, where the standard kit would be near its limit. On a car with upgraded sequential turbos at moderate boost, the standard 10953 holds the power with a lighter pedal and is easier to drive in traffic.

Will the HD clutch make the pedal heavy?

Heavier than stock and heavier than the standard kit, since clamp load rises by about 560 lb. Check the clutch master and slave cylinders and the release fork while the transmission is out, because a heavier clutch exposes worn hydraulic parts.

Does it fit every FD3S model?

Turn 14 lists the 10953HD for the 1993-1995 FD3S RX-7 in Base, R1, R2 and Touring form, all with the 13B-REW twin-turbo rotary and the 23-tooth, 26.4 mm input spline. Cars converted to other transmissions should be checked with EXEDY.

Is an HD single disc better than a twin disc for the FD?

A single thick disc keeps engagement and noise closer to stock and costs less to service. Twin-disc clutches hold more torque in the same space and suit very high-boost FD builds. The HD EXEDY Stage 2 Cerametallic Clutch covers the middle ground.

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Description

EXEDY Stage 2 Cerametallic Clutch Kit for FD3S Mazda RX-7 (HD Thick Disc)

EXEDY’s Stage 2 Cerametallic Clutch Kit for FD3S Mazda RX-7 in HD form raises clamp load to 2,653 lb for the single-turbo FD making serious boost. EXEDY rates it at 506 lb-ft at the flywheel and 405 lb-ft at the wheels on the same 236 mm thick disc and 23-tooth spline as the standard kit, so the step up costs pedal effort rather than drivability.

Design and Performance

Against the standard 10953, the HD cover lifts clutch torque from 501 to 635 lb-ft and flywheel torque from 400 to 506 lb-ft, by EXEDY figures. Disc, facing and spline are unchanged. The thick cerametallic disc keeps its heat capacity for launches, and the sprung center damper softens engagement, which matters with the higher clamp load.

Features

EXEDY Stage 2 Cerametallic Clutch with a thick disc, HD cover
Heavy-duty ductile-cast pressure plate, 2,653 lb
Same disc and spline as the standard kit
Sprung center damper to reduce driveline shock
SFI 1.1 compliant, according to EXEDY

Specifications

Disc diameter: 236 mm
Input spline: 23 tooth, 26.4 mm
Clamp load: 2,653 lb
Clutch torque capacity: 635 lb-ft
Torque capacity at the flywheel: 506 lb-ft
Torque capacity at the wheels: 405 lb-ft

Applications

Mazda RX-7: FD3S | 1993-1995 | 1.3L twin-turbo rotary (Base, R1, R2 and Touring)

Notes

When the EXEDY ZF01 flywheel is used, Turn 14 calls for adapter / counterweight N351-11-521
For a lighter pedal at lower power, see the standard EXEDY Stage 2 Cerametallic Clutch Kit for the FD3S RX-7
For smoother street engagement, see the EXEDY Stage 1 Organic Clutch Kit for the FD3S RX-7 in HD form

Frequently Asked Questions

How much more does the HD EXEDY Stage 2 Cerametallic Clutch hold on an FD? EXEDY rates the 10953HD at 405 lb-ft of torque capacity at the wheels against 320 lb-ft for the standard 10953, because clamp load rises from 2,093 lb to 2,653 lb. Flywheel torque moves from 400 to 506 lb-ft, with the same disc and spline.
Who needs the HD FD clutch? An FD with a large single turbo, high boost or ethanol fuel, where the standard kit would be near its limit. On a car with upgraded sequential turbos at moderate boost, the standard 10953 holds the power with a lighter pedal and is easier to drive in traffic.
Will the HD clutch make the pedal heavy? Heavier than stock and heavier than the standard kit, since clamp load rises by about 560 lb. Check the clutch master and slave cylinders and the release fork while the transmission is out, because a heavier clutch exposes worn hydraulic parts.
Does it fit every FD3S model? Turn 14 lists the 10953HD for the 1993-1995 FD3S RX-7 in Base, R1, R2 and Touring form, all with the 13B-REW twin-turbo rotary and the 23-tooth, 26.4 mm input spline. Cars converted to other transmissions should be checked with EXEDY.
Is an HD single disc better than a twin disc for the FD? A single thick disc keeps engagement and noise closer to stock and costs less to service. Twin-disc clutches hold more torque in the same space and suit very high-boost FD builds. The HD EXEDY Stage 2 Cerametallic Clutch covers the middle ground.

About EXEDY

EXEDY Corporation of Neyagawa, Osaka, traces its clutch business back to 1923 and built its name as Daikin Clutch before adopting the EXEDY brand. It is a leading original-equipment maker of clutches and powertrain parts, and its racing line supplies Hyper Series multi-plate clutches for drag, circuit and rally use. EXEDY Globalparts Corporation, its wholly owned US subsidiary, supports the range in North America.

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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EXEDY Stage 2 Cerametallic Clutch Kit for FD3S Mazda RX-7 (HD Thick Disc) [10953HD]

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EXEDY Stage 2 Cerametallic Clutch Kit for FD3S Mazda RX-7 (HD Thick Disc)

Design and Performance

Features

Specifications

Applications

Notes

Frequently Asked Questions

About EXEDY

Reviews