If you are looking for a B16B engine for sale, know first that it is a JDM-only 1.6L VTEC engine from the EK9 Civic Type R, built for revs rather than torque. The B18C gives you the same B-series swap ease with more displacement, and the K20A is a newer, stronger platform that needs a more involved swap. For an EG or EK Civic that should stay simple, a B-series engine is the easiest path. For maximum power and long-term upside, the K20A wins if your budget covers the extra parts.
All three are legendary Honda engines, and all three show up in swap builds every day. Here is how they differ and how to choose.
B16B engine for sale: what you are actually buying
The B16B came in the Japanese-market EK9 Civic Type R. It was never sold in a US-market car, so every one here is an import. It shares a lot with the B18C, including the taller block, but uses a shorter-stroke 1.6L rotating assembly. The result is an engine that loves high rpm and feels its best near the top of the tach.
Most buyers want the B16B for originality, for an EK9 tribute or simply because it is a rare piece of Honda history. On the street, its torque is modest compared with the bigger engines on this list. That is not a flaw, just its character.
Our JDM Honda B16B engine is listed on its own, and there is also an EK9 Type R B16B engine with 5-speed LSD transmission package. When you compare a B16B engine for sale against others, check what is included: ECU, harness, transmission and accessories all change the real price.
The B18C: more displacement, same swap
The B18C is the 1.8L DOHC VTEC engine from the Integra GSR and Integra Type R. US cars carried the B18C1 in the GSR and the B18C5 in the Type R, while JDM cars used their own variants. Type R versions got more aggressive cams, intake and internal work.
For most street cars, the B18C is the more satisfying engine. It has the same high-rpm VTEC feel as the B16B with more torque in the middle of the rev range. It also bolts into EG and EK Civics and DC Integras using the same general B-series swap approach. For a Type R version, see our Integra DC2 Type R 1.8L VTEC engine and confirm the exact engine code on the listing or the block stamping.
The K20A: a different generation
The K20A is Honda’s 2.0L i-VTEC engine. JDM Type R versions came in cars like the DC5 Integra Type R, EP3 Civic Type R and FD2 Civic Type R. US cars got related versions, such as the K20A2 in the early RSX Type S and the K20A3 in the RSX base and 2002 to 2005 Civic Si.
The K-series is newer, stronger and more modern than the B-series. It has a timing chain instead of a belt, variable cam timing on the intake side, and a large aftermarket. The tradeoff is fitment. The K-series sits differently in the engine bay, uses its own transmissions and needs K-specific mounts, shifter linkage, axles and wiring when you put it into an older Civic or Integra. Kits make it straightforward, but it is still more work and more money than a B-series swap.
Options range from US-market RSX and Civic Si engines for budget builds to a JDM K20A Type R engine with 6-speed transmission, loom and ECU for the full package.
B16B vs B18C vs K20A comparison
| Engine | Displacement | Origin | Character | Swap into EG/EK/DC chassis |
|---|---|---|---|---|
| B16B | 1.6L | JDM EK9 Civic Type R | High-revving, light torque | Easy, B-series mounts |
| B18C | 1.8L | Integra GSR and Type R | Strong top end, better midrange | Easy, B-series mounts |
| K20A | 2.0L | Type R and RSX/Civic Si variants | Strongest overall, modern design | Moderate, K-swap kit needed |
Power ratings differ by market, model year and variant. Use the listing or Honda’s spec data for the exact engine code you are buying.
Which engine fits your swap
- EK Civic tribute or collector build: the B16B, ideally with the matching transmission.
- Daily-driven Civic or Integra with a sensible budget: the B18C delivers the best mix of power and simplicity.
- Long-term project that may see more power later: the K20A has more headroom and a bigger aftermarket.
- Already own a B-series transmission: stay with B16 or B18. A K20A means changing the transmission too.
What to check on a JDM engine
An imported JDM engine is a used part, and its history matters as much as its engine code. Before you buy, look at:
- The engine code stamped on the block, so you know which variant you are getting. Our guide to finding an engine code by VIN helps you match codes.
- What is included: ECU, harness, transmission, intake, alternator and starter.
- Compression or leak-down results when available.
- Whether the timing belt and water pump should be replaced before you install a B-series.
- Oil condition and any signs of overheating or leaks.
Our used engine buying checklist goes into more detail on what to ask before you order.
Emissions and legality
Swap rules depend on where you live. Many states require the engine to be the same year or newer than the vehicle and to retain its emissions equipment. Check your state rules and the EPA guidance on vehicle modifications before you commit to a swap for a street-registered car.
Shopping for a Honda swap engine
Browse our Honda replacement engines to compare B-series and K-series options, or see everything under the Honda brand page. For factory information on current models, visit Honda.
Frequently asked questions
Is a B16B worth it over a B18C?
For collectors and EK9 builds, yes. For a street car where you want usable power, the B18C usually makes more sense because of its extra displacement.
Can I bolt a K20A into an EG or EK Civic?
Yes, with a K-swap kit that includes mounts, shifter, axles and wiring changes. It is a common swap, but it is more work than a B-series.
Do B16 and B18 engines use the same transmission?
They are both B-series and share the same general transmission family, but gear ratios, final drive and limited-slip availability vary. Confirm the transmission code before you buy.
How do I verify which engine I have?
Check the engine code stamped on the block, usually near the transmission mating surface, and compare it to the listing and Honda reference data.
Start with the right reference 
Plan the arrival Always confirm the exact model, part number, condition and included components on the product listing. For a compatibility question, contact TorqueHarbor before ordering.