Drivetrain› Manual Transmissions and Components

Synchrotech

Carbon Master Rebuild Kit

$808.45

SKU: MK-SYN117-3

In Stock
In Stock
Ships by Sep 13
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$100 Minimum Order
30 Days Return
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Overview

The Synchrotech Carbon Master Rebuild Kit is a transmission overhaul kit engineered for the 2006–2010 Honda Civic Si 6-speed. This kit includes Pro Series Carbon Synchros, sleeves, bearings, and seals for a complete rebuild.
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The Synchrotech Carbon Master Rebuild Kit (MK-SYN117-3) provides a comprehensive solution for rebuilding the 6-speed manual transmission in your 2006–2010 Honda Civic Si. This kit is specifically designed for PNN3, PNN4, and SPNM transmission types and features a triple cone 1st/2nd gear setup, dual cone 3rd/4th gear, and single cone 5th/6th gear synchro configuration. Included in this master kit are Synchrotech® 1–6 Pro Series Carbon Synchro Sets, corresponding synchro springs and sleeves, four shaft bearings, a bearing clip, two axle seals, and an input shaft seal. The Pro Series Carbon Synchros are designed with carbon lining to ensure smoother and faster shifting, making this kit ideal for street performance, track use, or simply restoring your transmission to optimal condition. It's trusted by racers and builders for reliable Honda transmission rebuilds, capable of handling the power and high RPMs characteristic of the Civic Si.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandSynchrotech
Part NumberMK-SYN117-3
CategoryDrivetrain

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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