Parts Now Pay Later with
Log In Cart
Log In

Create An Account

Log In Cart
Your Cart Is Empty
Free Shipping Over $299.99

Free Shipping Over $299.99

Orders of $299.99 or more ship free within the continental U.S.
Shipping to Alaska and Hawaii is additional and not included.
We do not ship international at this time.

Shipping Policy

SynchroTech K Series 6-Speed Carbon Synchro 3-4 Sleeve Set
Part Number: SO-K20-3C

Images may be for reference only

SynchroTech K Series 6-Speed Carbon Synchro 3-4 Sleeve Set
Part Number: SO-K20-3C

Be the first to review!
$230.95

Reward Points

It pays to shop with K Series Parts and our reward points program! For every $1.00 you spend you earn reward points.

They are easy to earn, just log in to your account when you check out. If you don't have one it is free and easy to setup.

They are easy to use during check out. Click on the "Have Reward Points?" on the shipping and payment selection page.


Reward Point Program Details

You earn 2 points for every $1.00 that you spend.

100 points equal a $1.00 discount.

Maximum discount per order is 2.5% of the order total.

There is no minimum order total to redeem points.

Points do not apply to shipping or sales tax.

Points are not redeemable for cash.

The point value per dollar, points earned per purchase, and order minimum are subject to change.

Earn 462 reward points. Learn More


Product Details

Part Number: SO-K20-3C
Brand: SynchroTech
Transmission: Manual

Synchrotech SO‑K20‑3C – Carbon Synchro Sleeve Set for K-Series 6-Speed Transmissions (3rd/4th Gears). The Synchrotech SO‑K20‑3C is a high-performance carbon synchro sleeve set designed for the 3rd and 4th gears of Honda/Acura K-Series 6-speed manual transmissions. This set includes Pro Series carbon-lined synchros, hardened steel sleeves, and springs, offering enhanced shift performance and durability over OEM components.

Features:
  • Comprehensive Kit: Includes carbon-lined synchros, hardened steel sleeves, and springs for both 3rd and 4th gears.
  • Premium Carbon-Lined Synchros: Utilizes carbon-carbon lining technology for improved friction and faster engagement, enhancing shift feel and reducing wear. 
  • Hardened Steel Sleeves: Forged from higher tensile steel, the sleeves are stronger and lighter than OEM equivalents, ensuring long-lasting performance. 
  • Enhanced Shift Performance: The carbon lining and improved design contribute to quicker and more precise shifting, prolonging the life of your gear set. 
  • Wide Compatibility: Fits 6-speed K-Series transmissions in various Honda/Acura models, including 2002–2006 RSX, 2001–2006 JDM ITR/CTR, 2006–2009 Civic Si, and more.
  • Competitive Pricing: Offering a cost-effective solution for performance enthusiasts.
The Synchrotech SO‑K20‑3C Carbon Synchro Sleeve Set is an excellent choice for those seeking to enhance the shift performance and durability of their K-Series 6-speed manual transmission. With its premium carbon-lined synchros, hardened steel sleeves, and comprehensive kit, it offers a significant upgrade over OEM components, making it suitable for both daily driving and performance applications.

Due to the manufacturer's price control policy, this item may be excluded from promotions and discounts

WARNING: This product may contain chemicals known to the State of California to cause cancer or birth defects. www.P65Warnings.ca.gov.

Vehicle Fitment

Acura RSX
2002 Acura RSX Base Manual
2003 Acura RSX Base Manual
2004 Acura RSX Base Manual
2005 Acura RSX Base Manual
2006 Acura RSX Base Manual
2002 Acura RSX Type-S Manual
2003 Acura RSX Type-S Manual
2004 Acura RSX Type-S Manual
2005 Acura RSX Type-S Manual
2006 Acura RSX Type-S Manual
Acura TSX
2004 Acura TSX Base Manual
2005 Acura TSX Base Manual
2006 Acura TSX Base Manual
2007 Acura TSX Base Manual
2008 Acura TSX Base Manual
Honda Civic
2008 Honda Civic MUGEN Si Manual
2002 Honda Civic Si Manual
2003 Honda Civic Si Manual
2004 Honda Civic Si Manual
2005 Honda Civic Si Manual
2006 Honda Civic Si Manual
2007 Honda Civic Si Manual
2008 Honda Civic Si Manual
2009 Honda Civic Si Manual
2010 Honda Civic Si Manual
2011 Honda Civic Si Manual

Reviews ★★★★★ ★★★★★

No Reviews Yet!

Write a Review