BoostLine Forged Conrod Set Mitsubishi Lancer Evolution Evo 4-9 4G63T 7-Bolt – MI5906-866
Upgrade your Mitsubishi 4G63T with the BoostLine MI5906-866 Forged Connecting Rod Set, engineered specifically for high-output 7-bolt 4G63 turbo engines.
Manufactured from premium 4340 forged steel, these rods feature BoostLine’s patented three-pocket design for exceptional strength under extreme cylinder pressures. Supplied as a set of four with ARP 2000 rod bolts, they are an excellent choice for high-boost, motorsport and heavily tuned Mitsubishi Lancer Evolution Evo IV–IX builds.
In stock
Delivery & Return
We aim to dispatch orders as quickly as possible using reliable UK courier services. Delivery times can vary depending on stock availability, supplier location and the type of product ordered.
Estimated delivery times are shown where available, but these should be treated as a guide rather than a guaranteed delivery date.
Some specialist, made-to-order, imported or supplier-direct performance parts may take longer to arrive. If you need a part by a specific date, we recommend checking availability before ordering.
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UK Delivery
We deliver throughout the United Kingdom.
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Deliveries to the Scottish Highlands, Northern Ireland, Isle of Man, Isle of Wight, Channel Islands and other remote locations may take longer or incur additional charges.
International Delivery
International shipping may be available for selected products and destinations.
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Incorrect, Damaged or Faulty Items
Please inspect your order as soon as it arrives.
If your item is damaged in transit, faulty or different from what you ordered, contact us as soon as possible with your order number and clear photographs where relevant.
We will review the issue and advise you of the appropriate next steps.
Vehicle Fitment & Compatibility
It is the customer’s responsibility to check that a product is suitable for their vehicle before installation.
Please verify the vehicle model, year, engine, chassis code, part number and any relevant brake, suspension or drivetrain specification before ordering.
If you are unsure about compatibility, contact us before purchase with your vehicle registration or VIN and the product SKU where possible.
We cannot accept responsibility for incorrect fitment caused by inaccurate vehicle information, non-standard modifications or aftermarket conversions that were not disclosed before purchase.
Special Order & Made-to-Order Products
Some performance parts are specially ordered, imported, customised or manufactured specifically for a customer.
These products may be subject to different cancellation and return conditions. Where applicable, this will be confirmed before the order is processed.
Refunds
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If you have any questions about delivery, returns or product compatibility, please contact Performance Car Parts UK before ordering. We will be happy to help you check product details and fitment information.
BoostLine Forged Connecting Rod Set – Mitsubishi 4G63T 7-Bolt
When increasing the boost and power output of the legendary Mitsubishi 4G63T engine, the connecting rods become one of the most important components inside the engine. The BoostLine MI5906-866 Connecting Rod Set has been developed for demanding high-cylinder-pressure applications where strength and reliability are essential.
The MI5906-866 is manufactured from premium 4340 forged steel and uses BoostLine’s patented three-pocket rod architecture. The design combines high structural rigidity with optimised material placement to provide significantly greater resistance to bending loads than a conventional performance H-beam connecting rod.
Designed for High-Boost 4G63T Engines
BoostLine developed these connecting rods specifically for highly stressed forced-induction and nitrous applications. The manufacturer rates the design as suitable for extremely high-output engine combinations, with this application marketed as capable of supporting 1000+ hp builds when used as part of a correctly specified and assembled engine.
This makes the MI5906-866 particularly suitable for:
- Fast-road Mitsubishi Evo builds
- Track and competition engines
- Drag racing applications
- High-boost turbo conversions
- Big-turbo 4G63T builds
- Fully forged engine builds
- Motorsport applications
Premium 4340 Forged Steel
Each connecting rod is produced from high-strength 4340 forged steel, providing the toughness and fatigue resistance required for engines operating at substantially higher cylinder pressures than standard.
BoostLine rods are individually inspected and finish-honed, with dimensional inspection forming an important part of the manufacturing and quality-control process.
ARP 2000 Connecting Rod Bolts
The standard MI5906-866 set is supplied with 3/8-inch ARP 2000 rod fasteners.
This distinction is important because BoostLine also manufactures the MI5906-866+, which is the upgraded version using CA625+ fasteners. MI5906-866 is the ARP 2000 specification.
BoostLine Three-Pocket Design
Rather than relying on a conventional H-beam profile, BoostLine uses its patented three-pocket architecture to position material where it contributes most effectively to rod strength.
According to BoostLine application information, the design offers substantially improved bending strength compared with conventional H-beam connecting rods, making it particularly suitable for high-cylinder-pressure turbocharged engines.
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | BoostLine / Wiseco |
| Manufacturer Part Number | MI5906-866 |
| Product | Forged Connecting Rod Set |
| Quantity | Set of 4 |
| Engine | Mitsubishi 4G63T |
| Engine Type | 7-Bolt |
| Material | 4340 Forged Steel |
| Rod Length | 150.00 mm |
| Piston Pin Diameter | 22.00 mm |
| Journal Size | 45.00 mm |
| Big End Width | 26.37 mm |
| Small End Width | 22.86 mm |
| Housing Bore | 48.009 mm |
| Rod Bolt Size | 3/8 inch |
| Fasteners | ARP 2000 |
| Nominal Rod Weight | Approx. 657 g |
| Rod Design | BoostLine Three-Pocket |
| Pin Bushing | Bronze |
| Application | High-performance / forced induction |
The published dimensional specifications for MI5906-866 include a 150.00 mm length, 22.00 mm pin, 45.00 mm journal, 48.009 mm housing bore and approximately 657 g nominal rod weight.
Vehicle Compatibility
Designed for Mitsubishi 4G63T 7-bolt engines, including Mitsubishi Lancer Evolution Evo IV, Evo V, Evo VI, Evo VII, Evo VIII and Evo IX applications. Multiple specialist application listings specifically identify MI5906-866 for Evo 4–9 4G63 engines.
Important: Engine specification should always be checked before ordering. This connecting rod uses a 22 mm piston pin and 7-bolt 4G63 configuration and should not be selected purely from vehicle registration or model name.
Why Choose BoostLine MI5906-866?
If you’re building a high-power Mitsubishi 4G63T, the MI5906-866 gives you:
- Premium forged 4340 steel construction
- Strength designed for extreme cylinder pressure
- ARP 2000 rod bolts included
- Precision 150 mm factory-style rod length
- 22 mm piston-pin compatibility
- Patented BoostLine three-pocket construction
- Engineering aimed specifically at turbocharged high-output engines
- A matched set of four rods ready for your engine build
Whether you’re refreshing a fast-road Evo or assembling a serious motorsport 4G63T engine, the BoostLine MI5906-866 forged conrod set provides a strong foundation for a properly engineered performance build.
Package Contents
1 x Set of 4 BoostLine Forged Connecting Rods with ARP 2000 Fasteners
Delivery & Returns
UK Delivery
We deliver throughout the United Kingdom using reliable courier services. Delivery times vary depending on stock availability, supplier location, product size and destination.
Shipping charges are calculated at checkout where applicable. Larger, heavier, specialist or supplier-direct items may incur additional delivery charges.
Dispatch Times
We aim to dispatch in-stock products as quickly as possible. Some specialist, imported, made-to-order or supplier-direct performance parts may require additional processing time.
If you require a product by a specific date, please contact us before ordering so availability can be checked.
Tracking
Tracking information will be provided where available once your order has been dispatched.
International Delivery
International shipping may be available for selected products and destinations. Import duties, taxes, customs charges and local handling fees are normally the responsibility of the customer unless otherwise stated.
Returns
Please contact us before returning an item. Products should be returned in accordance with our returns policy and in suitable condition where applicable.
Special-order, made-to-order, customised or imported products may be subject to different cancellation and return conditions.
Damaged, Faulty or Incorrect Items
Please inspect your order as soon as it arrives. If an item is damaged, faulty or different from what you ordered, contact us promptly with your order number and clear photographs where relevant.
Vehicle Fitment
It is the customer’s responsibility to confirm product compatibility before installation. If you are unsure, contact us with your vehicle registration or VIN and the product SKU before ordering.
