A K-swap involves removing a car original engine and retrofitting a Honda K-series four-cylinder motor in its place. The K-series is favored by tuners for its robust block, high-flowing cylinder head, and massive aftermarket support. The swap requires custom motor mounts, a standalone ECU, and modified axles to mate the engine to the host chassis.
We're doing a K-swap on an old Miata to get reliable track day power without dealing with turbo heat issues.
Related terms
LS-swap
The act of installing a General Motors LS-series V8 engine into a vehicle that did not originally come with one.
Tesla-swap
Converting a traditional combustion vehicle to electric power using a salvaged Tesla powertrain.
ECU
The primary computer that manages engine performance, fuel delivery and emissions.
Crate engine
A fully assembled, brand-new or remanufactured engine delivered ready to install.