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Piston Rings
By OE Match
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
The OE Match Piston Ring Set is a high-quality replacement ring set designed for pistons with a 93mm bore diameter. Featuring ring dimensions of 1.20mm, 1.50mm and 2.00mm, this precision-engineered set is manufactured to OE specifications to ensure proper sealing between the piston and cylinder wall.
x6 Sets Required Per Car.
Fits:
- Porsche Boxster S 986 3.2L 1999-02
- Porsche Boxster S 986 3.2L 2003-04
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche 955 Cayenne S 4.5L V8 2003-06
- Porsche 955 Cayenne Turbo 4.5L 2003-06
Diagram Ref No 2
Piston rings are critical components within the engine, responsible for maintaining compression, controlling oil consumption and transferring heat from the piston to the cylinder wall. This OE Match ring set provides the correct fit, sealing performance and durability required for engine rebuilds, overhauls and performance restoration projects.
What This Product Does:
- Creates a gas-tight seal between the piston and cylinder wall.
- Maintains engine compression for efficient combustion.
- Controls engine oil distribution on cylinder walls.
- Prevents excessive oil from entering the combustion chamber.
- Transfers heat from the piston to the cylinder bore.
- Helps optimise engine performance, efficiency and reliability.
Symptoms Of Wear Or Failure:
- Excessive engine oil consumption.
- Blue smoke from the exhaust system.
- Reduced engine compression.
- Loss of engine power and performance.
- Poor acceleration and throttle response.
- Increased crankcase pressure.
- Excessive engine blow-by.
- Fouled spark plugs caused by oil contamination.
- Difficult starting and reduced fuel efficiency.
Why Replacement Matters:
- Piston rings operate under extreme temperatures, pressures and friction throughout every engine cycle. Over time, normal wear can reduce their ability to seal the combustion chamber and control oil movement effectively. Excessive wear may result in compression loss, increased oil consumption and reduced engine performance.
- If worn piston rings are not replaced, combustion gases can escape past the piston, while engine oil can enter the combustion chamber, leading to increased emissions, carbon build-up and potential engine damage. During engine rebuilds or major repairs, replacing piston rings is essential for restoring proper compression, oil control and overall engine efficiency.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99610303351
The product you are viewing cross references to these numbers
OEMatch Piston Rings — Fit, Function, Confidence
Piston rings are essential to cylinder sealing in Porsche engines. OEMatch supplies piston rings for Porsche models chosen to restore compression, control oil consumption and support efficient combustion during rebuilds or top-end repairs. Items are prepared for Porsche applications and drawn from original specifications where applicable.
Understanding OEMatch Piston Rings
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original piston rings.
OE (Original Equipment) refers to parts matching original specifications for the piston rings and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM piston rings engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
Piston rings sit in grooves around each piston to seal combustion gases, scrape excess oil from the cylinder wall and transfer heat to the bore. Worn or damaged rings cause loss of compression, increased oil consumption and blue exhaust smoke. Correct ring type, end-gap and clearance are important when rebuilding an engine to restore sealing and reduce premature wear.
Benefits Include
- Restores compression and engine responsiveness.
- Reduces oil consumption and visible exhaust smoke.
- Improves combustion efficiency and helps maintain emissions control.
Why Piston Rings Wear and Fail
- Insufficient or contaminated lubrication leading to scoring and accelerated wear.
- Carbon and deposit build-up causing rings to stick and lose sealing ability.
- Overheating, detonation or thermal distortion reducing ring tension.
- Corrosion or contamination from degraded oil or fuel contaminants.
The Importance of Replacing with OEMatch Piston Rings
Replacing worn piston rings restores compression, protects cylinder bores and reduces oil consumption. Choosing rings prepared for Porsche applications helps ensure correct materials and dimensions during rebuilds or top-end work. Proper selection and installation limit cylinder wear, support consistent combustion and contribute to longer engine service life when combined with correct assembly practices.
Advantages
- Selected for Porsche model applications and drawn from original specifications where applicable.
- Intended to control oil consumption and restore effective sealing during rebuilds.
- Available for both classic and modern Porsche engine types to suit a range of repairs.
Support & Advice
These items affect engine-critical systems. Installation should be carried out by a qualified technician following model-specific procedures and torque settings. Use calibrated tools and new fasteners where specified.