Original: $115.45
-65%$115.45
$40.41The Story
The SO-Y1-5 5Th Sleeve B-Series (89-91) is a carbon-lined 5th-gear synchro from Synchrotech, engineered for Honda/Acura B16 & B18 (cable) transmissions. Carbon friction material grips faster and wears longer than factory brass, delivering smoother, more consistent shifts under hard use — on the street, strip, or track.
Why upgrade to carbon synchros:
- Faster, smoother engagement and reduced grind
- Superior heat and wear resistance vs. OEM brass
- Ideal for high-horsepower, high-RPM and track use
- Direct-fit replacement — no transmission modification required
Backed by Synchrotech quality and shipped fast from Speedzone Performance.
Description
The SO-Y1-5 5Th Sleeve B-Series (89-91) is a carbon-lined 5th-gear synchro from Synchrotech, engineered for Honda/Acura B16 & B18 (cable) transmissions. Carbon friction material grips faster and wears longer than factory brass, delivering smoother, more consistent shifts under hard use — on the street, strip, or track.
Why upgrade to carbon synchros:
- Faster, smoother engagement and reduced grind
- Superior heat and wear resistance vs. OEM brass
- Ideal for high-horsepower, high-RPM and track use
- Direct-fit replacement — no transmission modification required
Backed by Synchrotech quality and shipped fast from Speedzone Performance.
