Cylinder kit, Biral big bore VW 83.5mm. Porsche 356/912  ❭  0081183BL

Cylinder Kit, Biral Big Bore VW 83.5mm.
Restore engine performance while increasing displacement with this OE Match Biral Big Bore VW 83.5mm Cylinder Kit. Produced to OE-style specifications, this premium Big Bore Biral cylinder kit is designed for compatible Porsche applications using the same engine platform where applicable. Featuring cast iron cylinder liners bonded to aluminium cooling fins, the Biral construction combines exceptional wear resistance with superior heat dissipation. The 83.5mm big bore design increases engine capacity while maintaining excellent thermal stability, making this kit ideal for performance engine builds, engine rebuilds, and concours-quality restoration projects.

Fits:

• Porsche 911 1965-1968 2.0L / 912 SWB (F)
• Porsche 356 1950-55
• Porsche 356A 1955-59
• Porsche 356B 1959-63
• Porsche 356C 1963-65  

The cylinder kit forms the combustion chamber walls, providing the precision-machined surfaces required for the pistons and piston rings to create efficient compression and combustion. Compared with conventional cast iron cylinders, Biral cylinders offer significantly improved cooling characteristics, while the larger 83.5mm bore increases engine displacement for enhanced torque and power potential. Over time, cylinder bores can become worn, scored, tapered, or distorted through continual piston movement and repeated heat cycles, leading to reduced compression, increased oil consumption, and declining engine performance. Replacing worn cylinders restores engine efficiency while benefiting from the enhanced cooling and increased capacity of the Big Bore design.  

What This Product Does:

• Provides precision-machined cylinder bores for the pistons.
• Increases engine displacement with an 83.5mm bore.
• Restores engine compression and combustion efficiency.
• Combines cast iron wear resistance with aluminium cooling.
• Improves heat dissipation for stable operating temperatures.
• Supports correct piston and piston ring operation.
• Replaces worn, scored, or damaged cylinders.
• 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.
• Loss of engine power or performance.
• Excessive crankcase blow-by.
• Scored, worn, or tapered cylinder bores.
• Piston slap or abnormal engine noise.
• Damage identified during engine overhaul.

Why Replacement Matters:

• The cylinders are essential for maintaining engine compression, efficient combustion, and reliable piston movement. As cylinder bores wear, engine performance declines, oil consumption increases, and internal engine wear accelerates. The Biral construction provides excellent heat dissipation while maintaining durable cast iron running surfaces, and the Big Bore 83.5mm design increases engine capacity to deliver improved torque and performance.
• Replacing worn cylinders with this OE Match Biral Big Bore 83.5mm Cylinder Kit restores compression, improves cooling efficiency, increases engine displacement, and supports long-term engine reliability. Manufactured as a direct replacement and produced to OE-style specifications, this OE Match Biral Big Bore Cylinder Kit provides reliable fit, performance, and durability for classic Volkswagen and compatible Porsche engine maintenance, performance upgrades, repairs, and restoration projects.

Related reference numbers
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0081183BL

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