Is the four puck EXEDY Stage 2 Cerametallic Clutch good for a street STI?

It works but is harsh. Four pucks grab abruptly and can chatter on gentle starts, which is tiring in traffic. The thick-disc 15951 has the same torque ratings with smoother take-up and suits a street-driven STI better than this drag and rally version.

How much power will the four puck STI clutch hold?

EXEDY rates the 15951P4 at 482 lb-ft of torque capacity at the flywheel and 386 lb-ft at the wheels, with 607 lb-ft of clutch torque. That covers an EJ257 with a tune and moderately larger turbo used for drag or rally events.

Four puck or HD four puck for an STI?

The 15951P4 uses the standard cover and is rated at 386 lb-ft at the wheels. The 15951HDP4 pairs the same four-puck disc with the HD cover for 548 lb-ft at the wheels. Choose the HD only when the power level requires it, because pedal effort rises considerably.

Does it fit the Legacy GT spec.B?

Yes. EXEDY USA lists this EXEDY Stage 2 Cerametallic Clutch, the 15951P4, for the 2007-2009 Legacy GT spec.B and the 2004-2014 WRX STI, and Turn 14 adds the 2017-2019 VA STI. All share the six-speed pull-type release and the 24-tooth, 25.2 mm spline.

Will a puck disc wear the flywheel faster?

Puck discs concentrate clamp load on a smaller area and can mark the flywheel face more than a full disc, especially with repeated launches. Resurfacing the flywheel at installation and at each clutch service keeps engagement even and avoids hot spots on the new disc.

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Description

EXEDY Stage 2 Cerametallic Clutch Kit for Subaru WRX STI and Legacy GT spec.B (4 Puck Disc)

EXEDY’s Stage 2 Cerametallic Clutch Kit for Subaru WRX STI and Legacy GT spec.B with the four-puck disc is the drag and rally version of EXEDY’s standard-clamp STI clutch. Four cerametallic pucks reduce rotating mass and engage almost instantly, giving the EJ257 a sharper launch, with the same 482 lb-ft flywheel rating as the full-face kit.

Design and Performance

The 240 mm four-puck disc rides on the 24-tooth, 25.2 mm spline, and Turn 14 lists it as a pull-type design with 607 lb-ft of clutch torque. Ratings match the thick full-face 15951. The difference is in engagement: separate pads bite with almost no slip and spin up quickly, which helps launches and stage starts but makes traffic driving harder.

Features

EXEDY Stage 2 Cerametallic Clutch with a four-puck disc
Pull-type design for the six-speed release system
Low-inertia disc for fast shifts and launches
Sprung center damper to protect the AWD driveline
SFI 1.1 compliant, according to EXEDY

Specifications

Disc diameter: 240 mm
Input spline: 24 tooth, 25.2 mm
Clutch torque capacity: 607 lb-ft
Torque capacity at the flywheel: 482 lb-ft
Torque capacity at the wheels: 386 lb-ft

Applications

Subaru Impreza WRX STI: GD / GR / GV | 2004-2014 | 2.5L H4 turbo (including Limited and Special Edition)
Subaru Legacy GT spec.B: 2007-2009 | 2.5L H4 turbo
Subaru WRX STI: VA | 2017-2019 | 2.5L H4 turbo (including Limited, Type RA and S209)

Notes

Turn 14 lists this kit as a pull-type clutch for the six-speed cars
Turn 14 also lists a 2007 Legacy 2.5i Special Edition, a non-turbo model, which is left out here; the VA WRX STI is listed for 2017-2019 only
For smoother engagement at the same rating, see the EXEDY Stage 2 Cerametallic Clutch Kit for the WRX STI with thick disc

Frequently Asked Questions

Is the four puck EXEDY Stage 2 Cerametallic Clutch good for a street STI? It works but is harsh. Four pucks grab abruptly and can chatter on gentle starts, which is tiring in traffic. The thick-disc 15951 has the same torque ratings with smoother take-up and suits a street-driven STI better than this drag and rally version.
How much power will the four puck STI clutch hold? EXEDY rates the 15951P4 at 482 lb-ft of torque capacity at the flywheel and 386 lb-ft at the wheels, with 607 lb-ft of clutch torque. That covers an EJ257 with a tune and moderately larger turbo used for drag or rally events.
Four puck or HD four puck for an STI? The 15951P4 uses the standard cover and is rated at 386 lb-ft at the wheels. The 15951HDP4 pairs the same four-puck disc with the HD cover for 548 lb-ft at the wheels. Choose the HD only when the power level requires it, because pedal effort rises considerably.
Does it fit the Legacy GT spec.B? Yes. EXEDY USA lists this EXEDY Stage 2 Cerametallic Clutch, the 15951P4, for the 2007-2009 Legacy GT spec.B and the 2004-2014 WRX STI, and Turn 14 adds the 2017-2019 VA STI. All share the six-speed pull-type release and the 24-tooth, 25.2 mm spline.
Will a puck disc wear the flywheel faster? Puck discs concentrate clamp load on a smaller area and can mark the flywheel face more than a full disc, especially with repeated launches. Resurfacing the flywheel at installation and at each clutch service keeps engagement even and avoids hot spots on the new disc.

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 Subaru WRX STI and Legacy GT spec.B (4 Puck Disc) [15951P4]

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EXEDY Stage 2 Cerametallic Clutch Kit for Subaru WRX STI and Legacy GT spec.B (4 Puck Disc)

Design and Performance

Features

Specifications

Applications

Notes

Frequently Asked Questions

About EXEDY

Reviews