Product Overview
Manley 4G63 Forged Piston Set – 85.5mm Extreme Duty 606105CE-4
The Manley 4G63 Forged Piston Set 606105CE-4 is a high-performance engine piston kit developed for Mitsubishi 2.0L 4G63 and 4G63T 7-bolt engines.
Manufactured as part of Manley’s Platinum Series Extreme Duty range, this four-piston kit is designed for demanding engine builds where precise piston geometry, durability and resistance to high cylinder pressures are important.
With an 85.50mm bore diameter, 1.375-inch compression height and −8cc piston dish volume, the 606105CE-4 is suitable for compatible Mitsubishi 4G63 engine configurations using an 88mm standard-stroke crankshaft.
It is particularly relevant to Mitsubishi Lancer Evolution builds where stronger forged engine internals are required.
Why Choose the Manley 4G63 Forged Piston Set?
Forged pistons are a popular choice for performance engine builds because of their strength and ability to withstand demanding combustion conditions when correctly specified and installed.
The Manley 606105CE-4 uses an Extreme Duty piston design intended for high-performance applications.
Its construction makes it a suitable option for experienced engine builders preparing a 4G63 engine for increased boost, demanding road use or motorsport.
Key advantages include:
- Forged piston construction
- Extreme Duty specification
- Precision-machined piston geometry
- 85.50mm oversize bore
- −8cc piston dish volume
- Compatibility with an 88mm standard-stroke configuration
- Four-piston set for a complete engine build
- Designed specifically for 7-bolt 4G63 engine applications
Correct installation, machining, ring gaps, engine calibration and supporting components remain essential for durability.
Manley Platinum Series Extreme Duty Construction
The Manley Platinum Series is developed for performance engine builders requiring accurately manufactured forged pistons.
Manley uses precision machining processes to control the relationship between piston skirts, ring grooves and other critical dimensions.
These manufacturing techniques help maintain consistent piston geometry and support effective piston ring operation.
The Extreme Duty specification is intended for more demanding applications than a conventional standard-replacement piston.
For a high-output Mitsubishi 4G63 build, selecting the correct piston specification is an important part of creating a reliable bottom-end assembly.
85.50mm Bore – 0.50mm Oversize
The Manley 606105CE-4 features an 85.50mm bore specification, representing a 0.50mm increase over the standard 85.00mm 4G63 bore.
This makes it suitable for an engine block that will be correctly machined and finished for the specified piston diameter.
Important: These pistons are not intended to be fitted into an untouched standard-bore cylinder without verifying and machining the block as required.
The engine builder must measure the supplied pistons and machine each cylinder to the manufacturer’s specified piston-to-wall clearance.
Proper bore preparation and honing are essential for piston stability, ring sealing and long-term engine performance.
1.375-Inch Compression Height and −8cc Dish Volume
Compression height is the distance between the centre of the wrist pin and the piston crown reference surface.
For this kit, Manley specifies a compression height of 1.375 inches, approximately 34.93mm.
The pistons feature a −8cc dish-volume specification.
Piston dish volume contributes to the overall combustion-chamber volume and influences the engine’s final compression ratio.
Manley quotes nominal compression ratios of:
- 9.0:1 for the specified DSM configuration
- 9.5:1 for the specified Evolution configuration
These figures depend on the associated combustion-chamber assumptions and engine dimensions.
Actual compression ratio may vary with cylinder-head machining, head-gasket thickness, deck height and other engine-building factors.
Always calculate the final compression ratio for the specific engine being assembled.
Designed for Mitsubishi 4G63 7-Bolt Engines
The Manley 606105CE-4 is intended for compatible 7-bolt Mitsubishi 4G63 engine assemblies.
The 4G63 is widely used in Mitsubishi performance applications, including multiple generations of the Lancer Evolution.
This piston set is associated with 88mm standard-stroke configurations and is not a universal replacement for every version of the 4G63 engine.
In particular, early 6-bolt engines use different piston and wrist-pin specifications.
Before ordering, confirm:
- Engine block type
- 7-bolt crankshaft configuration
- Finished cylinder bore
- Connecting-rod dimensions
- Wrist-pin compatibility
- Crankshaft stroke
- Required compression ratio
- Intended engine power and operating conditions
Suitable for Performance and Turbocharged Builds
The Manley Extreme Duty piston range is suited to engine-building projects where the standard engine internals are being upgraded to accommodate more demanding operating conditions.
Typical projects may include:
- Mitsubishi Evolution engine rebuilds
- Forged 4G63 bottom-end assemblies
- Turbocharged performance engine builds
- Motorsport engine preparation
- Replacement of damaged pistons during a professionally specified rebuild
A piston upgrade alone does not determine an engine’s safe power limit.
Engine reliability also depends on the crankshaft, rods, bearings, lubrication, cooling, fueling, turbocharger system and ECU calibration.
Professional Installation Is Essential
Forged pistons require careful engine measurement and assembly.
A qualified engine builder should verify piston-to-wall clearance, ring end gaps, piston orientation, connecting-rod compatibility and all associated assembly tolerances.
Incorrect clearances or unsuitable engine calibration can cause serious engine damage.
These pistons should be installed as part of a properly planned engine build, using Manley’s current technical documentation.
Complete Your Mitsubishi 4G63 Engine Build
Performance pistons work alongside other critical engine components.
At Performance Car Parts UK, you can browse supporting upgrades and engine parts for road and motorsport applications.
Explore:
For additional technical information, refer to the official Manley 606105CE-4 product specifications.
Buy Manley 4G63 Forged Pistons in the UK
If you are rebuilding a Mitsubishi 4G63 engine, the Manley 4G63 Forged Piston Set 606105CE-4 offers a specialist Extreme Duty piston solution for compatible 7-bolt applications.
With its 85.50mm bore, −8cc dish design and 88mm standard-stroke configuration, this kit is intended for precisely specified performance engine builds.
Order online from Performance Car Parts UK.
If you are unsure whether these pistons suit your engine, contact us with your engine code, block configuration and intended build specification before purchasing.
