Stage 4 Clutch Kit (1MD) for Subaru WRX STI 2004-2021 2.5L DOHC (EJ257) Turbo AWD
SKU: 34155432412

Stage 4 Clutch Kit (1MD) for Subaru WRX STI 2004-2021 2.5L DOHC (EJ257) Turbo AWD

Sale price$269.98 Regular price$299.98
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Description

Stage 4 Clutch Kit (1MD) for Subaru WRX STI 2004-2021 2.5L DOHC (EJ257) Turbo AWDAction Clutch's Stage 4 (1MD) Clutch Kit is designed to withstand even the most challenging conditions. Featuring a heavy duty single diaphragm pressure plate, reinforced drive straps, and an Unsprung MIBA Ceramic (available in a 4 or 6 puck) disc, this kit provides peak performance and extreme durability for low mild horsepower vehicles. Our Unsprung MIBA Ceramic clutch kit provides quicker engagement and will introduce some clutch chatter, which

Action Clutch's Stage 4 (1MD) Clutch Kit is designed to withstand even the most challenging conditions. Featuring a heavy-duty single diaphragm pressure plate, reinforced drive straps, and an Unsprung MIBA Ceramic (available in a 4 or 6 puck) disc, this kit provides peak performance and extreme durability for low/mild horsepower vehicles. Our Unsprung MIBA Ceramic clutch kit provides quicker engagement and will introduce some clutch chatter, which will minimize after proper break-in. For those looking to take their dedicated race vehicles to the next level, the Stage 4 (1MD) Action Clutch Kit provides maximum control and power with little compromise on reliability.

At Action Clutch, every kit is quality checked by one of our experienced engineers (with over 60 years of collective experience) and signed off as safe before being released as a finished product. This gives you peace of mind knowing that your Action Clutch will perform consistently every time.

NOTE: Purchasing the wrong type of clutch kit for your specific engine power output can result in premature clutch failure, damage to the transmission and void warranty eligibility. If you’re unsure what kit is right for you, contact Action Clutch direct.

170% INCREASED HOLDING CAPACITY OVER FACTORY KIT*
RACE APPLICATIONS / DRAG / ROAD / DRIFT RACING

Specifications

Product Type Stage 4 Clutch Kit (1MD)
Product Weight (lbs)
SFI 1.1
 
What’s Included
  • Unsprung MIBA Ceramic 6 Puck Disc
  • Single Diaphragm HD Pressure Plate
  • Pilot Bearing / Bushing (when applicable)
  • Clutch Alignment Tool
  • Conventional Release Bearing

Break-in Requirements
500 street miles / Keep RPM’s under 4500, no more than half-throttle, no boost (if applicable).
Proper break-in is required in order to retain product warranty, ensure longevity and holding capacity.

Disclaimers
Ceramic based clutch discs intend to increase the holding capacity and durability of the clutch as opposed to an increased life expectancy. Using a ceramic based material for easy street driving may contribute to premature wear of the clutch kit due to the harsher engagement and because of the higher tendency to slip the clutch during street driving.

Using a clutch kit with an unsprung clutch disc on a stock or lightly modified power engine that is daily/street driven vehicle can break the rivets on the clutch disc hub. Unsprung clutch kits are not designed for daily/street use or any constant on/off engagement environment. This can be compared to running a marathon in sandals vs a proper running shoe. If you were to run the marathon in sandals, you have no cushion or comfort and can cause injuries or wear you down faster than using proper running shoes.

*Increase in holding capacity is rated in Crank Torque, not Wheel Torque




SFI Spec 1.1 Replacement Flywheels and Clutch Assemblies

California Residents: Prop 65 WARNING: This product MAY contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.p65warnings.ca.gov
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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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
SKU: 34155432412

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James C. Mcclaran, Jr.
Waukegan, US
★★★★★ 4
Four Stars: Insightful and Impactful Reading
Format: Hardcover
This book provides clarity in human relationships pertaining to workplace, family, and social circles. Author Mel Robbins explains the human tendency of needing to belong and bond, having personal freedoms and space to make informed choices, and providing coping strength to not feel over burdened due to work or perceived social obligations or human stereotypes. "Let Them", "Let Me" is a series of strategies/skills that help one regain focus on finite time and energies to have more productive personal relationships and work outcomes. The book teaches one to de-prioritize things and channel emotions into actionable goals to set healthy boundaries in selection of friends, career paths, and effectively resolving conflicts. Some chapters are overly redundant (and precludes a fifth star rating); however, it's a worthwhile book that definitively helps me set more impactful goals in 2026 and beyond.
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Reviewed in the United States on January 31, 2026
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Chels marie
Lake Worth, US
★★★★★ 5
HIGHLY RECOMMEND
Format: Audiobook
I love Mel Robbin’s and this audiobook gave me a different perspective on my life. I would highly recommend it’s so easy to understand and it’s so enjoyable and enlightening to listen to.
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Reviewed in the United States on May 15, 2026
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DM
Los Angeles, US
★★★★★ 5
Book of life
Format: Hardcover
This book is a fantastic read, I think this is a book everyone should read. Very insightful and informative book for life.
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Reviewed in the United States on May 15, 2026
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kmurph31
Grantham, US
★★★★★ 5
NON FICTION IS A GREAT WAY TO LISTEN WHILE YOU DRIVE! TRY AUDIBLE!
Format: Audiobook
LET THEM AUDIBLE NON-FICTION INSPIRATIONAL BOOK ON LISTENING TO MEL ROBBINS MOTIVATIONAL ADVICE MAKES MY DRIVING DESTINATIONS ENJOYABLE! I had something like 24 AUDIBLE CREDITS that have built up because I'm a visual person that loves to read. I've had the membership for over ten years and I only like certain NON FICTION SELF DEVELOPMENT books which I listen to Memoirs, Self help, but never fiction books, because my imagination is more vivid when I read. I always either listen to my podcasts on Spotify or NON-FICTION on AUDIBLE which is owned by Amazon. I can't drive anywhere without my Podcasts or very few Non-Fiction Titles that interest me, but I have had those credits and I love MEL ROBBINS so I decided to try it on AUDIBLE. My friends who read that listen to fiction on AUDIO understood why I bought the same fictional title and I had already loved reading it on my Kindle. It was a favorite lifetime reading experience and I own many of the same KINDLE & AUDIBLE versions but I noticed that fiction book that it was one of the most beautifully written books that when I went to listen to it, I quickly gave up because it was bland. I have been told by more frequent readers like myself who listen to the Audio version and recommend it to me on Audio since they enjoyed it better have said listening to fiction is a skill that you have to develop, so I stick to NON FICTION and I need to listen to something while I'm driving so I buy the Kindle Version & the AUDIBLE and it makes my driving to destinations shorter.v That's why I have Spotify because there's two favorite podcasts but I pay extra for no commercials and now my top favorite podcast has commercials which I 'm considering cancelling because the reason I pay extra is because the commercials drive me crazy so now Spotify says it's up to the podcast. The reason I've been a member since 2018, is because it is synced to the Bluetooth, in my car and the podcasts don't require Cell towers so you don't get the buffering that I do with Audible in areas where there aren't Cell towers which we call them dead zones. I'm recommending this AUDIBLE PURCHASE called, "LET THEM," because MEL ROBBINS is a new motivational author to me, and she wrote the book which she has some fascinating inspirational content, that I have learned some ideas to improve my life. She is a fantastic narrator in her soothing voice. One nice thing about AUDIBLE is they are extremely friendly and if you don't like the AUDIO BOOK Listening experience, you can return it, which you can't do with the KINDLE Books. so I have had to return something only twice in fifteen years, since I usually love what I purchase. I do recommend this book on AUDIBLE to listen to or if you don't have a membership they used to have a free trial and a free book if you're a new member. But I'm not sure, but however medium you choose this is a FAVORITE and it's a bestseller that I can promise you will love it, as well. It has a very high rating of tens of thousands of five star ratings which is even more evident that it's a Spectacular choice!
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Reviewed in the United States on July 24, 2025
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catCass
Houston, US
★★★★★ 5
Let Them and Let Me, is what I needed!
Format: Hardcover
I wish that I could give this book much more than 5 stars. I absolutely loved reading it. The book is so interesting and the information is useful and makes a lot of sense. I have been reading the book since I received it on March 5, 2026 and it was very hard for me to put it down. I am now on the concluding chapter "Your Let Me Era Is Here." I feel a little sad that I am finishing the book because I want to know more. However, I decided to practice the suggestions and theories the author stated in the book to see if they really worked. The 5-4-3-2-1 suggestion was used anytime there was something that I didn't feel motivated to do, and it worked. I felt better afterwards. The "Let Them" and "Let Me" theories have worked also. But, I realized it is going to take time for me to make the needed changes consistently. Still, I am very happy that I purchased and read this book. It is definitely worth the money and time spent reading and making application of the information. It boosted my confidence!
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Reviewed in the United States on March 29, 2026

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