Porsche 924S 944 968 928 24 mm piston pin – standard & lightweight

New 24 mm piston pin for various Porsche 924S, 944, 968 and 928 engines. Available in a standard version and a lightweight version.

The piston pins are made of 16MnCr5 steel and are ground and hardened. The lightweight version reduces the reciprocating mass in the engine. This makes it particularly interesting for an engine rebuild or performance engine build.

Three versions are available:

• Standard replacement: 24 × 14,8 x 66,85 mm – 146 g

• Lightweight: 24 × 16 x 66,85 mm – 120 g

• Lightweight: 24 × 16 x 64,85 mm – 117 g

The lightweight piston pin can also be combined with our H-beam connecting rods.

Suitable for

Depending on the required length, suitable for various versions of:

• Porsche 924S

• Porsche 944 2.5

• Porsche 944 2.7

• Porsche 944 S

• Porsche 944 S2

• Porsche 944 Turbo

• Porsche 968

• Porsche 928

• Porsche 928 S

• Porsche 928 S4

• Porsche 928 GT

• Porsche 928 GTS

The required length varies by engine and piston. Therefore, always measure the original piston pin during an engine rebuild before ordering a new piston pin. On V8 engines, the crankshaft must always be rebalanced when using a lighter piston pin, connecting rod or piston.

Replaces part number

We do not use a specific Porsche OEM part number for this piston pin.

Select the correct version based on:

• diameter

• length

• piston used

• connecting rod used

• measured original piston pin

Which piston pin should I choose?

We measured original piston pins from various Porsche engines. The length measurements below are intended solely as a measurement reference.

• Porsche 924S: approximately 64,89 mm

• Porsche 944 standard: approximately 64,89 mm

• Porsche 944 S: approximately 64,85 mm

• Porsche 944 S2: approximately 64,82 mm

• Porsche 944 Turbo: approximately 64,80 mm

• Porsche 968: approximately 66,81 mm

• Porsche 928 4.5: approximately 66,80 mm

• Porsche 928 S3: approximately 65,00 mm

• Porsche 928 S4: approximately 64,81 mm

• Porsche 928 GT: approximately 64,81 mm

• Porsche 928 GTS: approximately 64,81 mm

We do not yet have our own measurement reference available for the Porsche 928 S 4.7.

The values above were measured from original parts and are for reference only. Always check the length of the existing piston pin and the piston used before installation.

Important fitment information

All versions have a nominal outer diameter of 24 mm.

The correct length depends on the engine and piston used. Therefore, do not order solely based on the vehicle model.

Always check the following before ordering:

• diameter of the original piston pin

• length of the original piston pin

• piston used

• connecting rod used

The measurements above help with making an initial choice, but do not replace measuring your own parts.

Advantages of the lightweight piston pin

• Made of 16MnCr5 steel

• Ground and hardened

• Available in two lengths

• From just 117 grams

• Up to approximately 18% lighter than our standard version of the same length

• Reduces the reciprocating mass

• Interesting for engine rebuilds and performance engine builds

• Suitable for combination with our H-beam connecting rods

• Calculated up to 7000 rpm

• Calculated for applications up to 450 Nm

• Available individually

Calculated load capacity

The 24 mm lightweight piston pin has been technically calculated for use in, among others, the Porsche 944 Turbo.

Based on this calculation, the piston pin is suitable for applications up to:

• Maximum engine speed: 7000 rpm

• Maximum engine torque: 450 Nm

• Diameter: 24 mm

• Material: 16MnCr5 steel

• Finish: ground and hardened

The calculation takes into account both the mass forces at high engine speeds and the load caused by cylinder pressure and fatigue.

For prolonged heavy track or endurance use, we recommend an additional safety margin. At a lower maximum engine torque, more fatigue reserve is available.

The stated values are based on a technical strength and fatigue calculation. They are not a substitute for a material certificate or destructive practical testing.

Lightweight piston pin with H-beam connecting rods

The lightweight piston pin is particularly interesting in combination with our lightweight H-beam connecting rods.

In a Porsche 944 four-cylinder engine, combining four H-beam connecting rods and four lightweight piston pins can provide a total weight saving of approximately 944 grams compared with the original combination we measured.

When H-beam connecting rods and lightweight piston pins are used in a Porsche 928, the total weight saving across eight cylinders can be approximately 1888 grams.

When making such a modification to a Porsche 928, the correct crankshaft balancing and bobweights must be taken into account during engine assembly.

When should you replace a piston pin?

Always inspect the piston pins during an engine rebuild.

Replacement may be necessary in the event of:

• visible wear

• grooves or damage on the running surface

• excessive clearance between the piston pin and connecting rod bushing

• excessive clearance in the piston

• replacement of the connecting rods

• reconditioning of the connecting rods

• reuse of original pistons during an engine rebuild

Do not inspect only the piston pin. Also check the bore in the piston and the piston pin bushing in the connecting rod.

Installation information

The piston pin connects the piston to the small end of the connecting rod.

Before installation, measure at least:

• diameter of the existing piston pin

• length of the existing piston pin

• fit in the piston

• fit in the connecting rod bushing

Do not use only the Porsche model or engine type to determine the correct length. Always check the parts actually installed in the engine.

For a complete performance engine build, the piston, piston pin, connecting rod and crankshaft balancing must be assessed as one combination.

Wössner pistons

If you are using new Wössner pistons, first check the piston pins supplied with the pistons.

If the supplied piston pins are suitable for the intended application, replacement with our lightweight piston pin is not necessary.

If you want to reduce the reciprocating mass further, first compare the dimensions and weight of the supplied piston pin with our lightweight version.

Technical details

• Product: Piston pin / piston pin / wrist pin

• Diameter: 24 mm

• Material: 16MnCr5 steel

• Finish: Ground and hardened

• Standard version: 24 × 14,8 x 66,85 mm – 146 g

• Lightweight version: 24 × 16 x 66,85 mm – 120 g

• Lightweight version: 24 × 16 x 64,85 mm – 117 g

• Calculated maximum engine speed: 7000 rpm

• Calculated maximum engine torque: 450 Nm

• Application: Engine rebuilds and performance engine builds

• Condition: New

• Product code: L1219

• Package contents: 1 piston pin

Frequently asked questions

Does this piston pin fit all Porsche 944 engines?

The various Porsche 944 engines use a piston pin with a diameter of approximately 24 mm, but the required length may vary. Therefore, always measure the original piston pin before ordering.

What is the difference between the standard and lightweight piston pins?

The standard version with a length of 66,85 mm weighs approximately 146 grams.

The lightweight version of the same length weighs approximately 120 grams. That is approximately 18% lighter.

The shorter lightweight version, measuring 64,85 mm, weighs approximately 117 grams.

Why use a lightweight piston pin?

A lighter piston pin reduces the reciprocating mass in the engine.

This is particularly interesting for a performance engine build or when lighter H-beam connecting rods are also used.

Is the lightweight piston pin suitable for a tuned Porsche 944 Turbo?

Yes. The 24 mm lightweight piston pin has been technically calculated for applications up to 7000 rpm and 450 Nm.

For prolonged heavy track or endurance use, we recommend an additional safety margin.

Does a lightweight piston pin increase power?

The piston pin itself does not directly increase engine power.

The advantage lies in the lower mass of the moving engine components.

Can I combine this piston pin with your H-beam connecting rods?

Yes. The 24 mm piston pins are suitable for combination with our H-beam connecting rods.

However, always check which pin length is suitable for the pistons used.

Is one piston pin or a complete set supplied?

The piston pins are sold individually.

A four-cylinder engine normally requires four piston pins. An eight-cylinder engine normally requires eight piston pins.