Engine Code: G4KJ
Displacement: 2.4L DOHC GDI
Fitment: 2012, 2013, 2014 Kia Optima (and select Hyundai/Kia models)
Condition: 🔧 100% Brand New – 0 Mileage
✅ Perfect Replacement – OEM-Spec Build
This brand-new 2.4L G4KJ engine is a direct replacement for your worn or failed Kia Optima engine. Built to original equipment specifications, it ensures a perfect fit and factory-level performance with zero prior usage. Whether you're restoring your daily driver or finishing a professional build, this engine is ready to drop in and go.
🔹 Features:
⚙️ Brand New Long Block Assembly
🚫 Zero Miles – Never Used or Installed
🧰 Includes cylinder head, block, pistons, crankshaft, camshafts, timing components
🔩 Built to meet or exceed OEM performance standards
📦 Crated and ready for shipping or local pickup
🔹 Applications:
2012 Kia Optima 2.4L
2013 Kia Optima 2.4L
2014 Kia Optima 2.4L
(May also fit other Hyundai/Kia models using the G4KJ Theta II engine – confirm with VIN)
🔒 Warranty:
🛡️ 6-Month Warranty
💬 Why Buy From JDM of San Diego?
We specialize in high-quality JDM and OEM-spec engines and transmissions. Every product is inspected, verified, and supported by a knowledgeable team that understands your build goals.
✔️ Fast Shipping
✔️ Local Pickup Available
✔️ Expert Support
Engine Specs
| Specification | Details |
|---|---|
| Engine Code | B20B |
| Displacement | 2.0L (1973cc) |
| Valvetrain | DOHC non-VTEC, 16 valve |
| Donor vehicle | 1997 to 2001 Honda CR-V (JDM) |
| Mileage | Around 50,000 to 70,000 km |
| Included | Longblock. Wiring harness and ECU available on request. |
Why This Engine Works So Well
A B20B engine for sale like these gives builders a strong base to work from. Many shops choose these standard engine for three reasons:
- It has a thick block that holds up under boost
- The long stroke design gives good torque off the line
- It bolts into many Honda and Acura chassis with minor changes
- It pairs well with a VTEC head for a B20/VTEC upgrade
Where This Engine Comes From
We import this motor for sale directly from Japan. Japan’s inspection rules push owners to sell cars early, often with low mileage. This means you get a strong Honda B20 engine with plenty of life left. Our team checks the import history and paperwork before we list it for sale.
Warranty and Shipping
Each engine comes with a 90-day warranty from the date you receive it. We ship across the United States from our shop in Orlando, Florida. Most orders go out within 2 to 3 business days.
Related Products
Is this engine compatible with my US-spec vehicle?
Yes, but some sensors or accessories may need to be swapped from your original US-spec engine to ensure proper wiring and check-engine light compliance.
What is the average mileage on your imported JDM engines?
Most of our imported JDM engines have between 45,000 to 65,000 miles on them, as verified by export certificates from Japan.
Do you offer shipping outside the United States?
Currently, we only ship to the continental United States. For international orders, you must arrange your own freight forwarding service.
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JDM Experts Available
Low-mileage Japanese imports inspected for quality. Shop with confidence. Our team of JDM specialists is here to guide you.
Up to 60 Days Warranty on Engines & Transmissions.
Affordable Products in the best quality
Benefit from our knowledgeable expert mechanics
Various available JDM engines in warehouse
