Cylinder kit, Biral big bore VW 86mm. Porsche 356/912  ❭  0081186BL

Cylinder Kit, Biral Big Bore VW 86mm.
Increase engine capacity while benefiting from superior cooling with this OE Match Biral Big Bore VW 86mm Cylinder Kit. Produced to OE-style specifications, this premium Biral cylinder kit is designed for compatible classic 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 excellent heat dissipation. The larger 86mm big bore design increases engine displacement, making this kit an ideal choice for performance engine builds, complete 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 generate efficient compression and combustion. The Biral design offers superior thermal management compared with conventional cast iron cylinders, while the 86mm bore increases engine capacity for improved torque and power potential. Over time, cylinder bores can become worn, tapered, scored, or distorted through continual piston movement, heat cycles, and normal engine wear, leading to reduced compression, increased oil consumption, and declining engine performance. Replacing worn cylinders restores engine efficiency while providing the cooling and performance advantages of the Biral Big Bore design.  

What This Product Does:

• Provides precision-machined cylinder bores for the pistons.
• Increases engine displacement with an 86mm bore.
• Combines cast iron wear resistance with aluminium cooling.
• Restores engine compression and combustion efficiency.
• 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 fundamental to 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 cooling performance while maintaining durable cast iron running surfaces, and the 86mm Big Bore design increases engine displacement to deliver enhanced torque and overall performance.
• Replacing worn cylinders with this OE Match Biral Big Bore 86mm Cylinder Kit restores compression, improves cooling efficiency, increases engine capacity, and supports long-term engine reliability. Manufactured as a direct replacement and produced to OE-style specifications, this OE Match Biral Big Bore VW 86mm 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
Related, superseded, cross reference or alternative numbers for comparison.

0081186BL

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