2002-2005 Honda Civic SiR 5 Speed Manual Transmission EP3

This used JDM 5-speed manual transmission is pulled from a 2002-2005 Honda Civic SiR (EP3) and is compatible with the K20A, K20A2, and K20Z1 engine codes. It's a straightforward factory-style gearbox rather than an LSD-equipped unit, so weigh that against your build goals before ordering.

What it's suited for

Beyond a direct EP3 replacement, this transmission is a common swap choice into an Integra, Civic EK, or Civic EG chassis, where its gearing and factory Honda internals hold up to both daily driving and tuned street or track use. It's a good fit for drivers restoring an original SiR or building a K-series swap from a different Honda platform.

Before you order

Match the engine code to your specific build, since this gearbox is tied to the K20A family listed above rather than a different series, and confirm your shift linkage and mounts suit an EP3-sourced unit before buying. As a used, imported transmission, expect wear consistent with a tested, running unit rather than new-condition cosmetics; confirm mileage and inspection notes with us first rather than assuming a specific figure.

Common questions

Does this come with a limited slip differential? No, this is a standard SiR gearbox rather than an LSD version.

What engines does it bolt to? K20A, K20A2, and K20Z1, as used in the EP3 SiR.

Is it the same unit as a factory EK or EG gearbox? It's sourced from an EP3 SiR, so treat chassis mounts on an EK or EG as something to confirm first rather than assume.