Original: $808.45
-65%$808.45
$282.96The Story
The MK-SYN125 Carbon Master Kit L15B Civic Si EX-T 6 Speed (16-20) is a carbon-lined synchro from Synchrotech, engineered for Honda L15B 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.
Details & Craftsmanship
Every detail has been carefully considered to bring you the perfect product.
Description
The MK-SYN125 Carbon Master Kit L15B Civic Si EX-T 6 Speed (16-20) is a carbon-lined synchro from Synchrotech, engineered for Honda L15B 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.
