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Mahle Piston & Cylinder
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9871030511X/1KIT
Product Information
Restore the heart of your Porsche with this set of six MAHLE engine pistons, precisely engineered to the specifications of original Porsche pistons. Designed specifically for the Porsche 987 Boxster and Cayman 3.4 L engines, this complete piston set includes all six pistons needed for a complete engine rebuild or overhaul.
SET OF 6
Fits:
Porsche 987.1 Boxster 3.4L 2006 - 2008
Porsche 987C.1 Cayman 3.4L 2005 - 2008
Specification:
Cyl.Bore: 96.005 mm
Length: 51.8 mm
Compression Height: 32.35 mm
Bolt Length: 56 mm
Bolt: Ø 22 mm
Valve Pocket Depth 1: 5.5 mm
Valve Pocket Depth 2: 5.5 mm
ach piston in the set is manufactured with high-strength aluminium alloy and precision machining to ensure optimal combustion sealing, durability under thermal stress, and reduced friction. Combined with piston rings and proper installation, this set helps maintain compression performance, engine efficiency, and long-term reliability - key to preserving the iconic performance and driving experience of the 987 platform.
Ideal for engine rebuilds, overhauls, or when replacing worn or damaged pistons, this full set ensures correct balance and uniform wear characteristics across all cylinders.
This piston is suitable for use in Porsche 987.1 Boxster 3.4 L (2006–2008) and 987C.1 Cayman 3.4 L (2005–2008) engines when matched to the correct engine series and specifications. Always verify compatibility with your vehicle’s VIN or engine details before ordering.
Manufactured to MAHLE’s exacting standards, the piston offers a direct fit, excellent thermal performance, and minimal friction with correct clearances.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9871030511X
The product you are viewing cross references to these numbers
Product Information
Engine piston set - 96.00 Ø - Engine type: M 97.21 / M 97.22Restore the heart of your Porsche with this set of six MAHLE engine pistons, precisely engineered to the specifications of original Porsche pistons. Designed specifically for the Porsche 987 Boxster and Cayman 3.4 L engines, this complete piston set includes all six pistons needed for a complete engine rebuild or overhaul.
SET OF 6
Fits:
Porsche 987.1 Boxster 3.4L 2006 - 2008
Porsche 987C.1 Cayman 3.4L 2005 - 2008
Specification:
Cyl.Bore: 96.005 mm
Length: 51.8 mm
Compression Height: 32.35 mm
Bolt Length: 56 mm
Bolt: Ø 22 mm
Valve Pocket Depth 1: 5.5 mm
Valve Pocket Depth 2: 5.5 mm
ach piston in the set is manufactured with high-strength aluminium alloy and precision machining to ensure optimal combustion sealing, durability under thermal stress, and reduced friction. Combined with piston rings and proper installation, this set helps maintain compression performance, engine efficiency, and long-term reliability - key to preserving the iconic performance and driving experience of the 987 platform.
Ideal for engine rebuilds, overhauls, or when replacing worn or damaged pistons, this full set ensures correct balance and uniform wear characteristics across all cylinders.
This piston is suitable for use in Porsche 987.1 Boxster 3.4 L (2006–2008) and 987C.1 Cayman 3.4 L (2005–2008) engines when matched to the correct engine series and specifications. Always verify compatibility with your vehicle’s VIN or engine details before ordering.
Manufactured to MAHLE’s exacting standards, the piston offers a direct fit, excellent thermal performance, and minimal friction with correct clearances.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9871030511X
98710305114
98710305113
503 PI 00108 000
503 PI 00108 002
The product you are viewing cross references to these numbers
About kit
This kit is comprised of the following items:
6 x Engine piston. Porsche 987 Boxster / Cayman - MAHLE 96.00 Ø - M 97.21 / M 97.22 (9871030511X/1)
Vehicle Group
Vehicle Group
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Cayman S 3.4L 987C 2005-08
Price: £1,548.00 inc. VAT
Orderable - 3 to 6 Days
9871030511X/2KIT
Product Information
Restore the heart of your Porsche with this set of six MAHLE engine pistons, precisely engineered to the specifications of original Porsche pistons. Designed specifically for the Porsche 987 Boxster and Cayman 3.4 L engines, this complete piston set includes all six pistons needed for a complete engine rebuild or overhaul.
SET OF 6
Fits:
Porsche 987.1 Boxster 3.4L 2006 - 2008
Porsche 987C.1 Cayman 3.4L 2005 - 2008
Specification:
Cyl.Bore: 96.505 mm
Length: 51.8 mm
Compression Height: 32.35 mm
Bolt Length: 56 mm
Bolt: Ø 22 mm
Valve Pocket Depth 1: 5.5 mm
Valve Pocket Depth 2: 5.5 mm
ach piston in the set is manufactured with high-strength aluminium alloy and precision machining to ensure optimal combustion sealing, durability under thermal stress, and reduced friction. Combined with piston rings and proper installation, this set helps maintain compression performance, engine efficiency, and long-term reliability - key to preserving the iconic performance and driving experience of the 987 platform.
Ideal for engine rebuilds, overhauls, or when replacing worn or damaged pistons, this full set ensures correct balance and uniform wear characteristics across all cylinders.
This piston is suitable for use in Porsche 987.1 Boxster 3.4 L (2006–2008) and 987C.1 Cayman 3.4 L (2005–2008) engines when matched to the correct engine series and specifications. Always verify compatibility with your vehicle’s VIN or engine details before ordering.
Manufactured to MAHLE’s exacting standards, the piston offers a direct fit, excellent thermal performance, and minimal friction with correct clearances.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9871030511X
The product you are viewing cross references to these numbers
Product Information
Engine piston set - 96.50 Ø - Engine type: M 97.21 / M 97.22Restore the heart of your Porsche with this set of six MAHLE engine pistons, precisely engineered to the specifications of original Porsche pistons. Designed specifically for the Porsche 987 Boxster and Cayman 3.4 L engines, this complete piston set includes all six pistons needed for a complete engine rebuild or overhaul.
SET OF 6
Fits:
Porsche 987.1 Boxster 3.4L 2006 - 2008
Porsche 987C.1 Cayman 3.4L 2005 - 2008
Specification:
Cyl.Bore: 96.505 mm
Length: 51.8 mm
Compression Height: 32.35 mm
Bolt Length: 56 mm
Bolt: Ø 22 mm
Valve Pocket Depth 1: 5.5 mm
Valve Pocket Depth 2: 5.5 mm
ach piston in the set is manufactured with high-strength aluminium alloy and precision machining to ensure optimal combustion sealing, durability under thermal stress, and reduced friction. Combined with piston rings and proper installation, this set helps maintain compression performance, engine efficiency, and long-term reliability - key to preserving the iconic performance and driving experience of the 987 platform.
Ideal for engine rebuilds, overhauls, or when replacing worn or damaged pistons, this full set ensures correct balance and uniform wear characteristics across all cylinders.
This piston is suitable for use in Porsche 987.1 Boxster 3.4 L (2006–2008) and 987C.1 Cayman 3.4 L (2005–2008) engines when matched to the correct engine series and specifications. Always verify compatibility with your vehicle’s VIN or engine details before ordering.
Manufactured to MAHLE’s exacting standards, the piston offers a direct fit, excellent thermal performance, and minimal friction with correct clearances.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9871030511X
98710305114
98710305113
503 PI 00108 000
503 PI 00108 002
The product you are viewing cross references to these numbers
About kit
This kit is comprised of the following items:
6 x Engine piston. Porsche 987 Boxster / Cayman - MAHLE 96.50 Ø - M 97.21 / M 97.22 (9871030511X/2)
Vehicle Group
Vehicle Group
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Cayman S 3.4L 987C 2005-08
Price: £1,548.00 inc. VAT
Orderable - 3 to 6 Days
9871030511X/1
Product Information
This MAHLE engine piston is a high-quality aftermarket replacement engineered to meet the specifications of the Porsche OE piston 98710305113 for Porsche Boxster and Cayman 987 models. This precision-manufactured piston is designed to restore engine performance, compression, and reliability during rebuilds or maintenance.
Price is for EACH (must be purchased as a set of 6)
Fits:
Porsche 987.1 Boxster 3.4L 2006 - 2008
Porsche 987C.1 Cayman 3.4L 2005 - 2008
Specification:
Cyl.Bore: 96.005 mm
Length: 51.8 mm
Compression Height: 32.35 mm
Bolt Length: 56 mm
Bolt: Ø 22 mm
Valve Pocket Depth 1: 5.5 mm
Valve Pocket Depth 2: 5.5 mm
As a core component of the internal combustion engine, the piston reciprocates within the cylinder bore, compressing the air-fuel mixture before ignition and transmitting combustion forces through the connecting rod to the crankshaft. It works together with piston rings to maintain proper sealing, manage oil control, and withstand high temperatures and pressures associated with engine operation.
Applications:
This piston is suitable for use in Porsche 987.1 Boxster 3.4 L (2006–2008) and 987C.1 Cayman 3.4 L (2005–2008) engines when matched to the correct engine series and specifications. Always verify compatibility with your vehicle’s VIN or engine details before ordering.
Performance & Fit:
Manufactured to MAHLE’s exacting standards, the piston offers a direct fit, excellent thermal performance, and minimal friction with correct clearances. It’s ideal for engine rebuilds, restorations, or replacing worn pistons to help maintain the original driving dynamics and engine efficiency that Porsche owners expect.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9871030511X
The product you are viewing cross references to these numbers
Product Information
Engine piston - Ø 96.00 - Engine type: M 97.21 / M 97.22This MAHLE engine piston is a high-quality aftermarket replacement engineered to meet the specifications of the Porsche OE piston 98710305113 for Porsche Boxster and Cayman 987 models. This precision-manufactured piston is designed to restore engine performance, compression, and reliability during rebuilds or maintenance.
Price is for EACH (must be purchased as a set of 6)
Fits:
Porsche 987.1 Boxster 3.4L 2006 - 2008
Porsche 987C.1 Cayman 3.4L 2005 - 2008
Specification:
Cyl.Bore: 96.005 mm
Length: 51.8 mm
Compression Height: 32.35 mm
Bolt Length: 56 mm
Bolt: Ø 22 mm
Valve Pocket Depth 1: 5.5 mm
Valve Pocket Depth 2: 5.5 mm
As a core component of the internal combustion engine, the piston reciprocates within the cylinder bore, compressing the air-fuel mixture before ignition and transmitting combustion forces through the connecting rod to the crankshaft. It works together with piston rings to maintain proper sealing, manage oil control, and withstand high temperatures and pressures associated with engine operation.
Applications:
This piston is suitable for use in Porsche 987.1 Boxster 3.4 L (2006–2008) and 987C.1 Cayman 3.4 L (2005–2008) engines when matched to the correct engine series and specifications. Always verify compatibility with your vehicle’s VIN or engine details before ordering.
Performance & Fit:
Manufactured to MAHLE’s exacting standards, the piston offers a direct fit, excellent thermal performance, and minimal friction with correct clearances. It’s ideal for engine rebuilds, restorations, or replacing worn pistons to help maintain the original driving dynamics and engine efficiency that Porsche owners expect.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9871030511X
98710305114
98710305113
503 PI 00108 000
503 PI 00108 002
The product you are viewing cross references to these numbers
Vehicle Group
Vehicle Group
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Cayman S 3.4L 987C 2005-08
Price: £258.00 inc. VAT
Orderable - 3 to 6 Days
Shop Securely
12 Month Warranty
Worldwide Delivery
9871030511X/2
Product Information
This MAHLE engine piston is a high-quality aftermarket replacement engineered to meet the specifications of the Porsche OE piston 98710305113 for Porsche Boxster and Cayman 987 models. This precision-manufactured piston is designed to restore engine performance, compression, and reliability during rebuilds or maintenance.
Price is for EACH (must be purchased as a set of 6)
Fits:
Porsche 987.1 Boxster 3.4L 2006 - 2008
Porsche 987C.1 Cayman 3.4L 2005 - 2008
Specification:
Cyl.Bore: 96.505 mm
Length: 51.8 mm
Compression Height: 32.35 mm
Bolt Length: 56 mm
Bolt: Ø 22 mm
Valve Pocket Depth 1: 5.5 mm
Valve Pocket Depth 2: 5.5 mm
As a core component of the internal combustion engine, the piston reciprocates within the cylinder bore, compressing the air-fuel mixture before ignition and transmitting combustion forces through the connecting rod to the crankshaft. It works together with piston rings to maintain proper sealing, manage oil control, and withstand high temperatures and pressures associated with engine operation.
Applications:
This piston is suitable for use in Porsche 987.1 Boxster 3.4 L (2006–2008) and 987C.1 Cayman 3.4 L (2005–2008) engines when matched to the correct engine series and specifications. Always verify compatibility with your vehicle’s VIN or engine details before ordering.
Performance & Fit:
Manufactured to MAHLE’s exacting standards, the piston offers a direct fit, excellent thermal performance, and minimal friction with correct clearances. It’s ideal for engine rebuilds, restorations, or replacing worn pistons to help maintain the original driving dynamics and engine efficiency that Porsche owners expect.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9871030511X
The product you are viewing cross references to these numbers
Product Information
Engine piston -
Ø 96.50 - Engine type: M 97.21 / M 97.22This MAHLE engine piston is a high-quality aftermarket replacement engineered to meet the specifications of the Porsche OE piston 98710305113 for Porsche Boxster and Cayman 987 models. This precision-manufactured piston is designed to restore engine performance, compression, and reliability during rebuilds or maintenance.
Price is for EACH (must be purchased as a set of 6)
Fits:
Porsche 987.1 Boxster 3.4L 2006 - 2008
Porsche 987C.1 Cayman 3.4L 2005 - 2008
Specification:
Cyl.Bore: 96.505 mm
Length: 51.8 mm
Compression Height: 32.35 mm
Bolt Length: 56 mm
Bolt: Ø 22 mm
Valve Pocket Depth 1: 5.5 mm
Valve Pocket Depth 2: 5.5 mm
As a core component of the internal combustion engine, the piston reciprocates within the cylinder bore, compressing the air-fuel mixture before ignition and transmitting combustion forces through the connecting rod to the crankshaft. It works together with piston rings to maintain proper sealing, manage oil control, and withstand high temperatures and pressures associated with engine operation.
Applications:
This piston is suitable for use in Porsche 987.1 Boxster 3.4 L (2006–2008) and 987C.1 Cayman 3.4 L (2005–2008) engines when matched to the correct engine series and specifications. Always verify compatibility with your vehicle’s VIN or engine details before ordering.
Performance & Fit:
Manufactured to MAHLE’s exacting standards, the piston offers a direct fit, excellent thermal performance, and minimal friction with correct clearances. It’s ideal for engine rebuilds, restorations, or replacing worn pistons to help maintain the original driving dynamics and engine efficiency that Porsche owners expect.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9871030511X
98710305114
98710305113
503 PI 00108 000
503 PI 00108 002
The product you are viewing cross references to these numbers
Vehicle Group
Vehicle Group
- Porsche Boxster 987 S 3.2/3.4L 2005-08/08
- Porsche Cayman S 3.4L 987C 2005-08
Price: £258.00 inc. VAT
Orderable - 3 to 6 Days
Shop Securely
12 Month Warranty
Worldwide Delivery
DISPLAYING 1 to 4 (of 4 products)
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About Mahle Piston & Cylinder
Mahle Pistons & Cylinders for High-Performance Porsche Engine Rebuilds
Mahle piston and cylinder sets are among the most respected internal engine components in the Porsche world. Built to exacting tolerances and engineered for strength, durability and efficient combustion, Mahle units deliver the reliability and performance required for both classic air-cooled engines and later water-cooled models. Whether restoring an original engine or undertaking a high-performance rebuild, Mahle piston and cylinder kits provide the foundation for smooth power delivery, optimal compression and long-term engine health.
These precision-engineered components ensure consistent fitment, stable thermal expansion and excellent sealing—key factors in the performance and longevity of any rebuilt flat-six engine.
What Mahle Pistons & Cylinders Do
Together, Mahle pistons and cylinders perform several
essential functions:
- Create the combustion chamber where fuel and air ignite
- Maintain consistent compression ratios for accurate engine performance
- Provide a durable sliding surface for piston movement
- Ensure efficient combustion through precise piston crown and ring design
- Regulate heat transfer to protect engine internals
- Support high-performance and high-RPM conditions without distortion
By delivering exceptional sealing and reduced friction, they contribute to smoother running, improved power and increased engine lifespan.
Why Pistons & Cylinders Commonly Fail
Even though Mahle components are designed for long-term
durability, they can wear or fail due to age, misuse or environmental factors.
Typical causes include:
- Cylinder scoring due to oil starvation or debris contamination
- Piston ring wear leading to blow-by and loss of compression
- Overheating causing piston expansion or scoring
- Detonation or pre-ignition damaging piston crowns or ring lands
- Poor lubrication quality accelerating friction-related wear
- High mileage fatigue causing piston skirt wear or cylinder distortion
- Incorrect tuning or fuel mixture issues stressing components
Symptoms often include excessive oil consumption, smoke on startup, loss of power, knocking noises or uneven compression readings.
Why You Should Replace Mahle Pistons & Cylinders During an Engine Rebuild
Replacing worn or ageing piston and cylinder sets with high-quality, precision-engineered Mahle components designed to match original performance levels ensures a reliable, efficient and powerful engine rebuild.
Benefits include:
- Restored compression and improved combustion efficiency
- Reduced oil consumption and better ring sealing
- Stronger resistance to detonation and high-temperature operation
- Improved power output and throttle response
- Enhanced long-term engine reliability and smoother running
- Correct fitment and performance for classic and modern Porsche engines
Upgrading to a fresh Mahle set is one of the most impactful improvements you can make during a rebuild.
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