2002-2005 HONDA CIVIC Si 5 speed Transmission, carbon synchros k20a3 Stage 2 Mfactory LSD



Product info

Remanufactured K20A3 5 speed transmission. The transmission has been completely torn down, all components inspected for wear and for excessive clearances. Reassembled to OEM specs, with all new bearings, seals and new Synchrotech carbon pro coated synchros. This transmission has upgraded Synchrotech carbon pro synchros in all gears. Unit has a upgraded MFactory LSD, lifetime warranty. Transmissions are shipped dry, please add fluid upon installation.  Please allow 8-22 business days for assembly.

Terms of purchase 

Please read the entire listing. Buyer agrees to purchase item pictured. Product will be shipped with insurance included and signature required upon delivery. 


ManualGearbox will provide a 1 yr. warranty from the date of sale. A new clutch, new pilot bearing, new Honda MTF or equivalent transmission fluid and professional installation is required for warranty to be valid. This warranty covers the transmission from assembly defects or product defects. Damage due to abuse, lack of fluid or improper fluid voids the warranty. Racing in any form or opening the transmission up will also void the warranty.

Transmission Core 

We would love to buy your old transmission core! Details will be sent after purchase. 


There are no reviews yet.

Be the first to review “2002-2005 HONDA CIVIC Si 5 speed Transmission, carbon synchros k20a3 Stage 2 Mfactory LSD”

Your email address will not be published. Required fields are marked *