Description

Tomei Forged H-Beam Connecting Rods for Mitsubishi Evo X 4B11 (TA203A-MT02A)

Firstly, Buy Tomei Evo X Rods online at Evomotorparts. Build a stronger foundation for your Mitsubishi Evolution X engine with Tomei Evo X Forged Connecting Rods. These forged H-beam rods are designed for the Mitsubishi 4B11 turbocharged engine. They offer a combination of structural rigidity, carefully designed geometry, and performance-focused construction for engine rebuilds and upgrades.

Tomei developed these connecting rods for compatible 4B11 applications using the standard 143.75 mm rod length. They can be used in suitable standard-stroke builds and certain stroker configurations, depending on the pistons and complete engine setup. If you are planning a performance rebuild, choosing the correct connecting rods is an important step toward building a reliable engine.

Part number TA203A-MT02A identifies this Tomei connecting rod set. It is a useful option for Mitsubishi Evo owners seeking specialist internal engine components rather than generic replacement parts. Before you buy, confirm the engine configuration, piston compatibility, and required bearing specifications.

Tomei Evo X Forged Connecting Rods: Features and Benefits

The connecting rods transfer force from the pistons to the crankshaft. They operate under repeated loads, so their strength, weight, and geometry matter during engine operation.

Tomei uses SNCM439 alloy steel for this connecting rod set. Its H-beam design combines structural strength with a carefully shaped profile for demanding engine applications.

Key features include:

• Forged H-beam construction: Designed to provide structural rigidity under demanding engine loads.
• SNCM439 material: Alloy steel used for performance-oriented connecting rods.
• 143.75 mm centre-to-centre length: Matches the specified standard rod length for the 4B11 application.
• Ribbed connecting rod caps: Designed to improve cap rigidity.
• Large locating dowel pins: Help maintain the intended alignment between the rod and its cap.
• Piston-side oil ports: Designed to improve lubrication around the small-end area.
• ARP L19 rod bolts: High-strength fasteners supplied as part of the connecting rod assembly, according to product listings.

These design features support a carefully planned engine build. However, the rods alone do not guarantee a particular horsepower limit or engine lifespan. Results depend on the complete engine combination, machining, assembly, tuning, and operating conditions.

Why Choose Tomei Evo X Connecting Rods?

Firstly, these rods offer a purpose-designed option for the Mitsubishi 4B11 engine. Their specified dimensions help engine builders plan compatible piston and crankshaft combinations.

Secondly, the H-beam profile and ribbed cap design focus on structural rigidity. These features are relevant when selecting internal engine components for a performance-oriented build.

Thirdly, the included ARP L19 rod bolts provide the specified connecting rod fastening hardware. Correct installation remains essential, so always follow Tomei’s instructions and the applicable bolt specifications.

For Evo X owners rebuilding an engine or planning a more extensive upgrade, these rods can form part of a carefully matched rotating assembly. They should be selected alongside suitable pistons, bearings, crankshaft components, and an appropriate engine management setup.

Tomei Connecting Rod Specifications

Review the key specifications for part number TA203A-MT02A before ordering.

• Brand: Tomei
• Product: Forged H-beam connecting rod set
• Part number: TA203A-MT02A
• Engine application: Mitsubishi 4B11
• Vehicle platform: Mitsubishi Lancer Evolution X
• Material: SNCM439 alloy steel
• Rod length: 143.75 mm
• Big-end bore × width: 55.0 × 21.9 mm
• Small-end bore × width: 23.0 × 20.0 mm
• Rod bolts: ARP L19
• Rod bolt thread: 3/8-24
• Rod bolt neck length: 40 mm
• Bearing inner diameter: 52 mm
• Bearing width: 17 mm
• Listed rod weight: Approximately 588 g per rod

These dimensions are based on published product specifications. Confirm the latest Tomei documentation before machining or assembling your engine.

Mitsubishi Evo X 4B11 Fitment and Applications

The Tomei TA203A-MT02A connecting rods are designed for the Mitsubishi 4B11 engine used in the Lancer Evolution X.

Their 143.75 mm centre-to-centre length matches the specified standard rod length. Product listings identify applications using original-equipment pistons or compatible Tomei 2.3-litre stroker pistons.

However, piston compatibility depends on the full engine combination. A stroker build may require different pistons, crankshaft components, clearances, and compression calculations. Confirm the specifications of every component before assembly.

The earlier Mitsubishi Evolution VII, VIII, and IX models generally use the 4G63 engine. They require a different connecting rod application, so this 4B11 kit should not be selected for those engines without explicit manufacturer confirmation.

Installation and Engine-Building Considerations

Correct installation is essential when fitting forged connecting rods. Before assembly, inspect the crankshaft journals, bearing surfaces, piston pins, and connecting rod dimensions.

Follow Tomei’s installation instructions for bolt preparation, tightening, and final inspection. Use the specified procedures for the supplied ARP L19 fasteners rather than applying generic torque values.

Engine builders should also check bearing clearances, connecting rod alignment, piston compatibility, and rotating assembly balance. These checks help identify problems before the engine is started.

Connecting rod bearings should be sourced separately unless the seller explicitly confirms that they are included. Verify all supplied components before placing your order.

If you are planning a high-output or motorsport engine, work with an experienced engine builder to confirm that the rods, pistons, crankshaft, fasteners, and engine calibration are appropriate for your intended use.

Buy Tomei Evo X Forged Connecting Rods Online

When shopping for Mitsubishi Evo parts, choosing the correct engine components helps reduce fitment problems and delays during a rebuild. The Tomei TA203A-MT02A connecting rod set is an option for compatible 4B11 engine builds that require forged H-beam rods.

Before you order, check the part number, rod dimensions, piston application, fastener requirements, and package contents. Confirm whether you are retaining the standard crankshaft stroke or planning a stroker configuration.

Selecting compatible components and following the manufacturer’s assembly procedures helps create a more organised and carefully engineered engine build.

Frequently Asked Questions

1. What engines do Tomei TA203A-MT02A rods fit?

These connecting rods are designed for the Mitsubishi 4B11 engine used in the Lancer Evolution X. Verify the exact engine configuration and piston compatibility before ordering.

2. What is the length of these connecting rods?

The centre-to-centre length is 143.75 mm, which matches the specified standard rod length for this application.

3. What material are the rods made from?

Tomei specifies SNCM439 alloy steel for this connecting rod set. The rods use an H-beam design intended for performance engine applications.

4. Do these rods fit a 2.3-litre stroker build?

They can be used in compatible Tomei 2.3-litre stroker configurations with the appropriate pistons and other matched components. Confirm the complete combination before assembly.

5. Are rod bolts included?

Product listings specify ARP L19 connecting rod bolts with the rods. Check the seller’s package details to confirm the supplied hardware.

6. Are connecting rod bearings included?

Do not assume bearings are included. Confirm the package contents with the seller and select bearings that match your crankshaft journals and required clearances.

7. Will these rods increase horsepower?

Connecting rods do not directly increase horsepower. They are internal engine components that must be selected to suit the intended power, engine speed, and operating conditions.

8. Can I use these rods in an Evo VIII or Evo IX?

These rods are intended for the 4B11 application. The Evo VIII and Evo IX generally use the 4G63 engine, which requires a different connecting rod specification.

9. What should I check before ordering?

Confirm part number TA203A-MT02A, the 4B11 engine application, rod dimensions, piston compatibility, bearing requirements, and included hardware. If you are building a stroker engine, verify every component with your engine builder.

Conclusion

Choose Tomei Forged H-Beam Connecting Rods for Mitsubishi Evo X 4B11 (TA203A-MT02A) from Evomotorparts and shop our Mitsubishi Evo parts range for the components needed for your next engine rebuild or performance project.

Buy Tomei Evo X Rods online at Evomotorparts, Shop forged H-beam connecting rods for compatible Mitsubishi 4B11 engine builds.