Here's a look at the OEM K20 transmission detent spring as compared to Hybrid's longer, stiffer version on the right. The additional material, pushed into position, ...

Mated to the K20 block is an 8th gen. Civic transmission, turned longitudinally, that serves as a transfer case and, well, Castillo breaks it down best, "With the K-series transmission set ...

The original 1.5-liter single-cam four-cylinder has been swapped out with a 2.0-liter K20 inline four with a block from JBR Engines, ... The new engine is lashed to a PPG dog box transmission.

Moreover, the K20 has two different i-VTEC systems that govern the valvetrain. The K20A, K20A3, K20A4, K20Z2, and K20A6 have a 9.6:1 to 9.8:1 compression ratio and have an i-VTEC valvetrain that ...

As the name suggests, the K20 is a 2.0-liter engine with 221 hp and 159 lb-ft of torque, and its powerful punch was popular enough to spawn the entire Honda K-Series.