Piston set, Flat top 90x66mm. Porsche 914  ❭  VW9000T4FP

Piston Set, Flat Top 90x66mm.
Restore engine performance or support a high-quality engine rebuild with this OE Match Flat Top Piston Set, 90 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 high-strength aluminium alloy, these flat top pistons provide excellent durability, efficient heat transfer, and precise dimensional accuracy, ensuring reliable performance and long service life. They are ideal for standard engine rebuilds, performance upgrades, and concours-quality restoration projects.

Fits: 

Engine size: 1700cc
Stroke: For 66mm stroke crankshafts
Pistons: Hypereutectic aluminium alloy
Compression Height: 42mm

Set includes: 4 pistons, 4 pins and a set of rings.

The piston set converts combustion pressure into mechanical force by transferring energy through the connecting rods to the crankshaft. The flat top piston design promotes efficient combustion while maintaining the intended compression characteristics for compatible engine configurations. Over time, pistons can suffer from wear, scuffing, cracked ring lands, excessive carbon build-up, or heat damage, resulting in reduced engine performance, increased oil consumption, and loss of compression. Replacing worn pistons restores engine efficiency, smooth operation, and dependable reliability.

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 performance.
• Damaged piston crowns or cracked ring lands.
• Excessive cylinder blow-by.
• Damage identified during engine overhaul.

Why Replacement Matters:

• The pistons are among the most heavily loaded components within the engine, converting combustion energy into usable mechanical power while maintaining compression and efficient combustion. Worn or damaged pistons can cause reduced engine performance, increased oil consumption, excessive blow-by, piston noise, and accelerated wear of other engine components.
• Replacing worn pistons with this OE Match Flat Top Piston Set restores engine compression, improves combustion efficiency, reduces oil consumption, and supports long-term engine reliability. Manufactured as a direct replacement and produced to OE-style specifications, this OE Match Flat Top Piston Set, 90 x 66mm provides reliable fit, performance, and durability for classic Porsche engine maintenance, repairs, performance upgrades, and restoration projects.