Cylinder kit, Biral big bore 96mm, Type 4. Porsche 914  ❭  VW9600T4BL

Aluminium Biral 96mm Big Bore Cylinder Kit – Set of 4

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

Fits:

• Porsche 914 (1970-1976)

Manufactured using Aluminium Biral construction, these premium cylinders combine an aluminium outer body with a cast iron cylinder liner. This proven design offers the outstanding heat dissipation of aluminium while retaining the durability and wear resistance of a cast iron bore, making them an ideal choice for both fast road and performance engine builds.

The kit is designed to slip directly into any 1.7, 1.8 or 2.0-litre Type 4 crankcase without requiring crankcase machining, making installation straightforward during an engine rebuild.

Please Note:

Fits all 1.7, 1.8 and 2.0-litre Type 4 crankcases with no crankcase machining required. 1.7-litre cylinder heads must be machined to accept the larger 96mm cylinder diameter.

Whether you're rebuilding a tired engine or increasing engine capacity, this Aluminium Biral cylinder kit provides improved cooling, enhanced reliability and excellent long-term performance.

What Do Engine Cylinders Do?

Engine cylinders form the precision-machined bores in which the pistons travel, creating the compression required for efficient combustion and power production.

Their primary functions include:

• Guiding piston movement
• Maintaining engine compression
• Providing a durable wear surface
• Transferring combustion heat away from the engine
• Supporting smooth, efficient engine operation

The quality and condition of the cylinders directly influence engine power, oil consumption and reliability.

Why Do Engine Cylinders Wear Out?

After years of use, continual piston movement and repeated thermal cycling gradually wear the cylinder bores.

Common causes include:

• High engine mileage
• Poor lubrication
• Engine overheating
• Worn piston rings
• Dirt or debris entering the engine
• Corrosion during long-term storage

As cylinder wear increases, compression falls, oil consumption rises and overall engine performance deteriorates.

Why Upgrade to Aluminium Biral Cylinders?

Aluminium Biral cylinders provide significant advantages over conventional cast iron cylinders, particularly in high-performance or demanding driving conditions.

Benefits include:

• Superior heat dissipation for improved cooling
• Reduced operating temperatures
• Greater resistance to heat-related distortion
• Lightweight aluminium construction
• Durable cast iron liner for excellent wear resistance
• Increased engine capacity with the 96mm big bore design
• Ideal for fast road, touring and performance applications

The improved cooling characteristics help maintain more consistent engine temperatures, contributing to enhanced reliability and engine longevity.

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 significantly
• The engine is undergoing a complete rebuild
• Increased engine capacity and improved cooling are desired
• Heat damage or corrosion is present

Installing new Biral cylinders during an engine rebuild restores compression while providing a worthwhile performance and reliability upgrade.

Porsche 914 Type 4 Engine Rebuild & Performance Components

The Porsche 914 Type 4 engine is an excellent platform for both restoration and performance enhancement. During a rebuild, upgrading to Aluminium Biral cylinders offers a substantial improvement in cooling efficiency while increasing engine capacity with the proven 96mm big bore configuration.

Unlike conventional cast iron cylinders, Biral cylinders combine the excellent thermal conductivity of aluminium with the wear resistance of cast iron liners. The result is more stable operating temperatures, improved reliability and enhanced performance, particularly during spirited road driving and extended touring.

With no crankcase machining required, this kit offers one of the simplest and most effective upgrades available for Type 4 engines.

Benefits of the Aluminium Biral Big Bore Cylinder Kit

• Increased engine capacity and torque
• Superior heat dissipation
• Improved cooling efficiency
• Lightweight aluminium construction
• Durable cast iron cylinder liners Direct fit into 1.7, 1.8 and 2.0 Type 4 crankcase
• No crankcase machining required Ideal for road, touring and performance builds       

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