Parts Now Pay Later with
Log In Cart
Log In
Create An Account
Log In Cart
Your Cart Is Empty
Cart Total
Edit Your Cart Checkout
Free Shipping Over $349.99

Free Shipping Over $349.99

Orders of $349.99 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 92-01 Integra 3-4 Sleeve
Part Number: SO-120A

Images may be for reference only

Synchrotech 92-01 Integra 3-4 Sleeve
Part Number: SO-120A

Be the first to review!
$115.45

Builders Club Points

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

You will see the option to apply them at checkout just like selecting a payment option!

Builder Club Point Program Details

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

Maximum discount per order is 10% of the order total.

There is a minimum order total of $100 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 230 Builders Club Points. Learn More

Available to Order
Estimated to ship same or next business day
Ships directly from the manufacturer
Contact us for Availability
Ask us a Question

Product Details

Part Number: SO-120A
Brand: SynchroTech
Synchrotech SO-120A – Hardened 3rd/4th Gear Synchro Sleeve for B-Series (1992–2001 Integra LS/RS/GS) This durable replacement sleeve is designed for the 3rd and 4th gear synchronization assembly in Honda/Acura B-Series transmissions, offering a reliable solution for restoring smooth shifting and extending transmission life.

Features:
  • Precision OEM Fitment: Direct-fit replacement for the 1992–2001 Integra LS, RS, GS transmissions (B18A/B) including S80, Y80, and YS1 transmission codes. It may also fit early cable-operated B-Series transmissions (1989–1991).
  • Hardened Steel Construction: Engineered with a high-strength hardened steel alloy to resist wear under frequent gear engagement—ideal for both street driving and performance use.
  • Built for Long-Term Durability: Reinforces the internal gear sleeve to help preserve synchro integrity and sustain optimal shifting over time.
  • Straightforward Installation: Designed to match OEM dimensions and tolerances, making it a hassle-free component swap—perfect for rebuilds or targeted gear servicing.
Fitment:
  • 1992-2001 Integra LS RS GS
  • S80 (B18B), Y80 (B18B), YS1 (B18A) 
  • Cable B series 1989-1991 (Y2 A1 J1)
The Synchrotech SO-120A is a hardened steel synchro sleeve tailored for 3rd and 4th gears in 1992–2001 Integra (LS/RS/GS) B-Series transmissions. Its rugged construction and perfect fit make it a smart choice for anyone aiming to restore shift quality or reinforce transmission durability—whether for daily use or spirited performance driving.

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

Vehicle Fitment

Year Make Model Trim
1992 Acura Integra GS
1992 Acura Integra LS
1992 Acura Integra RS
1993 Acura Integra GS
1993 Acura Integra LS
1993 Acura Integra RS
1994 Acura Integra LS
1994 Acura Integra RS
1995 Acura Integra LS
1995 Acura Integra RS
1995 Acura Integra Special Edition
1996 Acura Integra LS
1996 Acura Integra RS
1996 Acura Integra Special Edition
1997 Acura Integra GS
1997 Acura Integra LS
1997 Acura Integra RS
1998 Acura Integra GS
1998 Acura Integra LS
1998 Acura Integra RS
1999 Acura Integra GS
1999 Acura Integra LS
2000 Acura Integra GS
2000 Acura Integra LS
2001 Acura Integra GS
2001 Acura Integra LS

Reviews ★★★★★ ★★★★★

No Reviews Yet!

Write a Review

Also Bought

Synchrotech 92-01 Integra 3-4 Hub
Synchrotech 92-01 Integra 3-4 Hub
$57.75
Honda Driver Side Axle Seal
Honda Driver Side Axle Seal
$16.44
Honda 94-01 Integra Passenger Side Axle Seal
Honda 94-01 Integra Passenger Side Axle Seal
$24.51
Action Clutch 99-00 Civic Si / 92-01 Integra OE HD Flywheel
Action Clutch 99-00 Civic Si / 92-01 Integra OE HD Flywheel
$169.96
Synchrotech 92-01 Integra LS 1-5 Carbon Synchro Set
Synchrotech 92-01 Integra LS 1-5 Carbon Synchro Set
$230.95
Synchrotech 92-01 Integra LS 1-5 Brass Synchro Set
Synchrotech 92-01 Integra LS 1-5 Brass Synchro Set
$173.20
Synchrotech 92-01 Integra LS 1-5 Synchro Spring Set
Synchrotech 92-01 Integra LS 1-5 Synchro Spring Set
$51.98
Synchrotech 92-01 Integra/96-00 Civic 5th and Reverse Hub
Synchrotech 92-01 Integra/96-00 Civic 5th and Reverse Hub
$57.75
Synchrotech 92-01 Integra B-Series 5th and Reverse Sleeve
Synchrotech 92-01 Integra B-Series 5th and Reverse Sleeve
$115.45

Free Shipping

K Series Parts offers free shipping for the majority of items that we sell that are shipped inside the continental United States.

Free shipping is done by the most cost effective shipping method for each order and delivery can takes 3 to 5 days on average.

Faster express shipping is available for an additional charge and calculated at checkout or on the edit basket page.

Certain products are not included in the free shipping, shipped via truck freight, or fulfilled by an outside supplier.

Alaska, Hawaii, and international orders are charged shipping and it is calculated by the website at checkout or on the edit basket page.

Instant Discount

Add this item to your cart to get an instant discount!

Not Available for Pickup

This item is not currently available for pick-up in our retail showroom and will be shipped directly to you.