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- Porsche 914 (1970-1976)
Restore engine performance or build a high-capacity air-cooled engine with this OE Match Flat Top Piston Set, 96 x 66mm. Produced to OE-style specifications, this precision-engineered piston set is designed for compatible classic Porsche applications using the same engine platform where applicable. Manufactured from premium high-strength aluminium alloy, these flat top pistons provide outstanding durability, excellent heat dissipation, and precise dimensional accuracy for dependable performance under demanding operating conditions. The larger 96mm piston diameter makes this set ideal for increased-displacement engine builds, performance upgrades, complete engine rebuilds, and restoration projects.
Fits:
- Porsche 914 (1970-1976) (Type 4, Bus Or Sandrail)
Stroke: For 66mm Crankshaft
Pistons: Hypereutectic aluminum alloy
Compression Height: 41.3mm
Set includes: 4 pistons,4 pins and a set of rings.
The piston set converts combustion pressure into rotational force by transferring energy through the connecting rods to the crankshaft. The flat top piston design promotes efficient combustion and consistent compression characteristics while supporting reliable engine operation. Over time, pistons can become worn through heat, friction, detonation, or lubrication issues, resulting in piston slap, damaged ring lands, excessive oil consumption, reduced compression, and declining engine performance. Replacing worn pistons restores engine efficiency and ensures smooth, reliable operation.
What This Product Does:
- Converts combustion pressure into crankshaft rotation.
- Restores engine compression and combustion efficiency.
- Supports smooth piston movement within the cylinders.
- Provides reliable sealing when used with new piston rings.
- Improves engine performance and reduces oil consumption.
- Replaces worn, damaged, or heat-affected pistons.
- Provides an OE-style fit for straightforward engine rebuilding.
Symptoms Of Wear Or Failure:
- Low engine compression.
- Excessive oil consumption.
- Blue exhaust smoke caused by oil burning.
- Piston slap or knocking noises.
- Loss of engine power or acceleration.
- Damaged piston crowns or cracked ring lands.
- Excessive cylinder blow-by.
- Damage identified during engine overhaul.
Why Replacement Matters:
- The pistons are essential components that convert combustion energy into usable mechanical power while maintaining compression and efficient combustion. Worn or damaged pistons reduce engine performance, increase oil consumption, create excessive blow-by, and accelerate wear throughout the engine. Replacing the pistons during an engine rebuild helps restore correct operating clearances and ensures dependable long-term performance.
- Replacing worn pistons with this OE Match Flat Top Piston Set restores compression, improves combustion efficiency, reduces oil consumption, and supports reliable engine performance. Manufactured as a direct replacement and produced to OE-style specifications, this OE Match Flat Top Piston Set, 96 x 66mm provides reliable fit, performance, and durability for classic Porsche engine maintenance, performance upgrades, repairs, and restoration projects.
- Porsche 914 (1970-1976)
- Porsche 912E 4CYL 1976
Long Cast Iron Cylinder Kit – Set of 4
Build the ultimate high-capacity Type 4 engine with this OE
Match Long Cast Iron Cylinder Kit, designed for Volkswagen Type 4
engines fitted to the Porsche 914 and Porsche 912E.
Fits:
- Porsche 914 (1970-1976)
- Porsche 912E 4CYL 1976
Available in 103mm, 104mm or 105mm bore sizes, these premium cast iron cylinders are specifically manufactured for long stroke and long connecting rod engine builds. Each cylinder is 14.6mm longer than a standard Type 4 cylinder and is supplied ready to be cut to the required height, allowing engine builders to achieve the exact deck height for custom performance applications.
Manufactured from high-strength cast iron for exceptional durability and wear resistance, these cylinders are intended for serious performance and competition engines where precision and flexibility are essential.
Please Note:
Available
in 103mm, 104mm and 105mm bore sizes.
Both
the cylinder heads and crankcase must be machined to accept the larger
bore.
Cylinders
are 14.6mm longer than standard and are designed to be cut to
fit for long stroke or long rod engine combinations.
Professional
engine machining and assembly are recommended.
What Do Engine Cylinders Do?
Engine cylinders provide the precision-machined bores in which the pistons travel, forming the combustion chambers that generate engine power.
Their primary functions include:
- Guiding piston movement
- Maintaining combustion chamber compression
- Providing a durable wear surface
- Dissipating combustion heat
- Supporting efficient engine operation and reliability
Cylinder accuracy is critical for achieving optimum compression, oil control and long-term engine performance.
Why Do Engine Cylinders Wear Out?
Engine cylinders are continually exposed to high temperatures, combustion pressures and piston movement throughout their service life.
Common causes of wear include:
- High mileage
- Poor lubrication
- Engine overheating
- Worn piston rings
- Dirt or debris entering the engine
- Detonation and excessive engine loads
As the cylinder bores wear, compression decreases, oil consumption rises and engine performance gradually deteriorates.
Why Upgrade to Long Big Bore Cylinders?
Long cylinders are specifically designed for custom Type 4 engine builds using long stroke crankshafts or longer connecting rods.
Their extended length provides engine builders with additional material that can be machined to achieve the precise deck height required for a particular engine specification.
Benefits include:
- Suitable for custom long stroke engines
- Compatible with long connecting rod combinations
- Allows precise deck height adjustment
- Available in 103mm, 104mm and 105mm bore sizes
- Increases engine capacity and performance potential
- Strong cast iron construction for maximum durability
- Ideal for high-performance road and motorsport engines
This flexibility makes them the preferred choice for bespoke engine builds where maximum performance and accurate engine geometry are essential.
When Should They Be Replaced?
Replacement or upgrading is recommended when:
- Cylinder bores are worn, tapered or scored
- Compression readings are below specification
- Oil consumption has increased significantly
- The engine is undergoing a complete performance rebuild
- A long stroke or long rod engine is being built
- Existing cylinders have suffered heat damage or corrosion
Installing a new long cylinder kit during an engine build provides the foundation for a reliable, high-performance Type 4 engine.
Porsche 914 & 912E Type 4 Performance Engine Components
When building a custom Type 4 engine, every component must work together to achieve the desired capacity, compression ratio and deck height. Long cylinders provide the flexibility required for stroked crankshaft and long connecting rod combinations, allowing experienced engine builders to machine the cylinders to the exact dimensions needed for a precision-built engine.
Manufactured from durable cast iron, these OE Match long cylinders are engineered for demanding applications where strength, reliability and accurate machining are essential. Whether you're building a powerful fast road engine or a dedicated competition motor, they provide the ideal foundation for a bespoke Type 4 build.
Benefits of the Long Cast Iron Cylinder Kit
- Available in 103mm, 104mm and 105mm bore sizes
- Specifically designed for long stroke and long rod engines
- 14.6mm extra cylinder length for custom machining
- Increases engine capacity and performance potential
- Durable cast iron construction
- Excellent wear resistance
- Precision engineered for professional engine builders