Engine Assembly 4B11 Mitsubishi Lancer Evo X 2.0-4B11T with ECU attached. aluminum block/head, DOHC, 16-valve MIVEC, and a timing chain. It produces 237–291 hp (stock) with a 9.0:1 compression ratio. It is often upgraded with forged internals (pistons/rods) for high-horsepower builds.

Mileage: 57000miles

compression : 125psi

Key Specifications & Features
Engine Type: 4-Cylinder, 16-Valve, DOHC, Turbocharged (4B11T).
Displacement: 2.0 Liters (
).
Block Material: Aluminum.
Compression Ratio: 9.0:1.
Horsepower/Torque: ~237–291 hp / 253–300 lb-ft (depending on GSR/MR/SE trim).
Valvetrain: Chain-driven DOHC with MIVEC (variable valve timing) on intake and exhaust.
Turbocharger: TD05HA.
Assembly & Build Information
Common Upgrades: Forged 2618 aluminum pistons (86mm), H-Beam or I-Beam connecting rods, ACL/King race bearings, and ARP main/head studs.
Head Assembly: The cylinder head features dual-variable valve timing, and upgrading to stronger head studs (e.g., ARP) is recommended for high boost.
Clearances: Proper assembly requires checking piston-to-wall clearance, ring end gaps, and bearing clearances.
Engine Dress: Complete assemblies (long block) usually include the turbocharger, intake manifold, injectors, fuel rail, and sensors (alternator/AC pump may or may not be included).

Performance & Reliability
Compared to 4G63: The 4B11T offers better low-to-mid-range power and is generally more efficient.
Tuning: Crucial for longevity; stock blocks can handle moderate power increases, but high-boost scenarios require aftermarket pistons and rods to prevent piston ring land failure.
Typical Failures: High-mileage or improperly tuned engines may suffer from ring land damage or, rarely, excessive crank walk.
Compatibility
Fits: 2008–2015 Mitsubishi Lancer Evolution X (GSR, MR, Final Edition).
JDM vs. USDM: JDM engines are often imported with low mileage (50k-60k range).