Enter your VAT number here and click Verify:
Your details have been verified. VAT number registered to:
,
.
Your order will now be zero rated for VAT purposes. We reserve the right to verify these details after your order request has been made and reinstate VAT if required.
Your VAT details were not recognised or were invalid. Your VAT number must be matched to your Billing Country as specified above. This is currently specified as . You do not need to enter the country code part of your VAT number as this has already been selected in your billing address details above.
The VAT number checking service is currently offline. Please supply your VAT details within the comments or special instructions field below and we will apply a VAT discount after placing your order request.
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
ø93 mm, Ringe 1,20 x 1,50 x 2,00 mm
These are better than the original & have been tested by many engine rebuilds.
Top Ring and Bottom rings = Stainless CAS Nitrided
Middle Ring = Cast Iron
Fits:
Porsche 986 3.2L Boxster 1999-04
Porsche 987 3.2L Boxster 2005>>
Porsche 955 4.5L Cayenne S 2003-06
Diagram Ref No 2
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Related, superseded, cross reference or alternative numbers for comparison.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.