Cylinder kit, Big bore VW 96MM Type 4. Porsche 914  ❭  VW9600T4L

96mm Big Bore Cylinder Kit – VW Type 4 – Porsche 914 – VW9600T4L

Increase the capacity and performance of your Porsche 914 Type 4 engine with this OE Match 96mm Big Bore Cylinder Kit, designed for Volkswagen Type 4 engines fitted to the Porsche 914.

Manufactured from high-quality cast iron, these precision-machined cylinders offer excellent durability, heat dissipation and long service life. The kit is designed to slip directly into any 1.7, 1.8 or 2.0-litre Type 4 crankcase without requiring any crankcase machining, making it one of the simplest and most effective engine upgrades available.

Please Note: If fitting this kit to 1.7-litre cylinder heads, the heads must be machined to accept the larger 96mm cylinder diameter. The cylinders themselves require no machining and are ready for installation.

Ideal for performance engine builds or replacing worn original cylinders, this big bore kit offers increased displacement potential while maintaining OE-quality fitment.

What Do Engine Cylinders Do?

Engine cylinders provide the precision-machined bore in which the pistons travel, creating the compression required for combustion and power generation.

Their primary functions include:

• Guiding piston movement
• Maintaining engine compression
• Providing a durable wear surface
• Dissipating combustion heat
• Supporting smooth, efficient engine operation

Precision cylinder bores are essential for achieving maximum engine performance, reliability and longevity.

Why Do Engine Cylinders Wear Out?

Over time, constant piston movement, high combustion temperatures and normal engine wear gradually affect the cylinder bores.

Common causes include:

• High mileage
• Poor lubrication
• Engine overheating
• Worn piston rings
• Dirt or debris entering the engine
• Corrosion following prolonged storage

As wear develops, compression falls, oil consumption increases and engine performance deteriorates.

Why Upgrade to a 96mm Big Bore Kit?

A 96mm Big Bore Cylinder Kit offers more than simply replacing worn cylinders—it provides the opportunity to increase engine displacement and improve performance during a rebuild.

Benefits include:

• Increased engine capacity
• Improved torque throughout the rev range
• Stronger acceleration
• Excellent foundation for performance engine builds
• Direct installation into 1.7, 1.8 and 2.0-litre crankcases without machining
• Durable cast iron construction for long service life

It is a popular upgrade for enthusiasts looking to extract additional performance from the proven Type 4 engine while retaining excellent reliability.

When Should They Be Replaced?

Replacement or upgrading is recommended if:

• Compression readings are below specification
• Cylinder bores are worn, tapered or scored
• Oil consumption has increased
• The engine is undergoing a complete rebuild
• Greater engine capacity is desired
• Heat damage or corrosion is present

Installing new cylinders during an engine rebuild restores compression while providing the opportunity to increase engine performance with minimal additional modification.

Porsche 914 Type 4 Engine Rebuild & Performance Components

The Type 4 engine is renowned for its strength and versatility, making it an excellent platform for both restoration and performance upgrades. During an engine rebuild, replacing worn cylinders not only restores compression and reliability but also provides an ideal opportunity to increase engine capacity with a proven big bore conversion.

The 96mm Big Bore Cylinder Kit offers an easy installation into all 1.7, 1.8 and 2.0-litre crankcases without the expense of machining the crankcase itself. Combined with quality pistons and correctly prepared cylinder heads, it provides improved torque, stronger performance and dependable long-term reliability.

Benefits of the 96mm Big Bore Cylinder Kit

• Increases engine capacity and torque
• Direct fit into all Type 4 crankcases
• No crankcase machining required
• Durable cast iron construction
• Restores engine compression
• Excellent foundation for performance engine builds OE-quality fitment and reliability

Piston Set Needed
1.7ltr / 1.8ltr - VW9600T4S66P
2.0ltr - VW9600T4S71P