2012–2015 Honda Civic Si 2.4L DOHC i-VTEC K24Z7 Engine – JDM K24A Replacement Motor

Bring your Civic Si back to life with a low-mileage JDM K24Z7 engine, the perfect replacement for your 2012–2015 Honda Civic Si. Imported directly from Japan and offered by J-Spec Auto Sports Inc., this engine delivers the performance, reliability, and high-revving fun that Honda enthusiasts demand — all while saving you thousands over a new factory motor.

The K24Z7 2.4L DOHC i-VTEC engine is known for its strong torque curve, high-RPM stability, and bulletproof engineering. This JDM version is an excellent replacement for the U.S.-market Civic Si engine and compatible with models using the K24Z7 or K24A platform. Each motor we import is hand-picked from low-mileage Japanese vehicles, where emissions regulations and shorter driving distances keep engines exceptionally clean and healthy.

Before shipment, every unit is thoroughly inspected and compression-tested to ensure top-tier performance. The result is a clean, ready-to-install JDM engine that restores your Civic Si’s original power and responsiveness — without the headaches of rebuilding your old one.

Why Buy From J-Spec Auto Sports Inc.?

For over a decade, J-Spec Auto Sports has been one of America’s most trusted importers of JDM engines, transmissions, and performance parts. We’re enthusiasts first, so we know what it takes to keep your build reliable and fun to drive. Our customers count on us for honest service, low-mileage parts, and fast nationwide shipping.

Each engine we sell is backed by our 90-day start-up warranty, giving you total confidence in your purchase. Whether you’re replacing a blown motor or upgrading your project car, the JDM K24Z7 engine from J-Spec Auto is a proven, cost-effective way to get your Civic Si running like new again.

Order today and see why J-Spec Auto Sports Inc. is the go-to source for premium, low-mileage JDM Honda engines across North America.