The Top Ten Engines to Build...
The Top Ten Engines to build

9| Honda K-Series

The Heir To The Engine Swap Throne Is Here…

Example of a the Honda K series engine

Coming in ninth is the Honda the K-series engine, the successor to Honda’s popular B series. This engine family succeeded the B-series in all applications for the 2002 model year across all models in the Acura and Honda vehicle lineups. This engine design is certainly a technological step up over is predecessor. The most notable improvement is the inclusion of Honda’s next generation variable valve timing technology, iVTEC. The iVTEC (intelligent-VTEC) system still offers two cam profiles like the original VTEC system. However, iVTEC adds variable cam phasing to the intake camshaft and in some applications, the exhaust cam too. This allows the ECU to actively advance and retard the camshaft timing. The high-flowing cylinder heads feature roller bearing cam followers for smoother operation. Currently, there are a total of 25 variants of K-series engines powering nearly all of the Honda passenger car model lines. Since its release 10 years ago, the K-series has been met with mixed reception due to its limited availability and higher cost to acquire and upgrade (compared to the B series.) Still, the K series is gaining momentum as the “new” hot Honda swap, enjoying plenty of aftermarket support. Built examples have already eclipsed the 1,000 horsepower mark, proving its worth in the world of racing and high performance. When the cost of entry comes down, we expect to see more K-swapped projects on the road and the track.


What’s Hot:Example of a the Honda K series engine

• “K” is the new B-series • iVTEC technology improves upon previous-generation VTEC • Clockwise crank rotation compatible with more aftermarket transmission solutions • Coil-on-plug ignition • Exceptional specific output • Excellent head design • Square bore and stroke dimensions • Chain-driven camshaftsExample of a the Honda K series engine • Interchangeable head and block combinations across the K-series engine family

What’s Not:

• Connecting rod upgrade required for serious forced-induction duty • Still higher cost to swap and modify relative to the B-series


Manufacturer: Honda
Years In Production: 2002-Present
Engine Code: K20, K24
Displacement (cc): 1,998cc, 2,157cc
Bore & Stroke (mm): 86mm x 86mm, 87mm x 90.7mm
Peak Horsepower (@ RPM): 160 bhp @ 6,500 RPM, 201 bhp @ 7,000 RPM
Peak Torque (@ RPM): 132 lb-ft @ 5,000 RPM, 170 lb-ft @ 4,400 RPM
Block Material: Aluminum
Head Material: Aluminum
Compression Ratio: 11.0:1
Camshafts: 302/305-degree (IN&EX, K20A2),
310/302-degree (IN&EX,K24A2)
Valves / Springs / Retainers: 16 Valves, iVTEC
Throttle Body: Single
Fuel Injectors: Top Feed, High Impedance, 310 cc/min (x4, K20A2),
270cc/min (x4, K24A2)
Ignition System: Coil-on-plug
Spark Plugs: NGK
Applications: 2002-2005 Honda Civic Si (EP3)
2002-2005 Acura RSX Type S (DC5)
2006-2011 Honda Civic Si (FA5,FG2)
2012-Present Honda Civic Si (FB6, FG4)

2 thoughts on “Top Ten Engines | Inside The Engines That Powered An Industry

  1. WelDun1 says:

    Definitely have to disagree with the list…

    1) 4G63T
    2) 2JZ-GTE
    3) RB26DETT (better as RB26DET)
    4) SR20DET
    5) 13B-REW
    6) EJ257
    7) VR38DETT
    8) B18C1/5 & B16A
    9) K series
    10) F20C & F22C

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