What does 'file-fit' mean for these piston rings?

File-fit means the ends of the piston rings are not pre-gapped. You will need to measure the gap between the piston and cylinder wall and file down the ring ends to achieve the correct clearance before installation. This allows for precise tuning to your specific engine build.

What is included in this set?

This set includes four complete piston ring sets. Each set contains the top compression ring, second compression ring, and oil control ring assembly needed for one piston.

Specifications

Brand: Manley Performance
Part #: 46920DT-4
UPC: 807298101118

Manley Ring Set Subaru EJ205WRX / EJ257 WRX STi 92.0mm File Fit 1.2mm x 1.2mm x 2.8mm - Set of 4

Name: Manley Ring Set Subaru EJ205WRX / EJ257 WRX STi 92.0mm File Fit 1.2mm x 1.2mm x 2.8mm - Set of 4
Brand: Manley Performance
SKU: manley-performance-manley-ring-set-subaru-ej205wrx-ej257-wrx-sti-92-0mm-file-fit-t14-112054
Price: 194.61 USD
Availability: InStock

$194.61

Only 2 left in stock

Manley Performance piston ring set for Subaru WRX STi EJ205 and EJ257 engines. 92.0mm bore size, file fit.

Key Features

This product includes four complete piston ring sets.
Each set is designed for a 92.0mm cylinder bore.
The ring dimensions are 1.2mm for the top ring, 1.2mm for the second ring, and 2.8mm for the oil control ring.
These are file-fit rings, requiring gapping to achieve proper piston-to-wall clearance.
Intended for Subaru EJ205 and EJ257 engines used in WRX and STi models.
Not CARB approved and cannot be shipped to California.

This piston ring set is designed for Subaru EJ205 and EJ257 engines. Please verify compatibility with your specific vehicle model and year.

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About this part

Product Details

This set includes four complete piston ring sets, each designed for a 92.0mm bore. These are file-fit rings, meaning you'll need to gap them to your specific piston and cylinder wall clearance during installation. The ring dimensions are 1.2mm for the top ring, 1.2mm for the second ring, and 2.8mm for the oil control ring. These are intended for Subaru EJ205 and EJ257 engines found in WRX and STi models.

Manley Performance is known for making well-built engine components, and these rings are no exception. The file-fit design gives you the flexibility to achieve precise clearances, which is crucial for proper engine sealing and performance, especially in modified or high-performance applications. Proper gapping ensures the rings can expand correctly under heat and pressure without binding, while also maintaining a good seal against the cylinder wall. This attention to detail in the ring design helps manage combustion pressure and oil consumption.

Keep in mind that these rings are not CARB approved and cannot be shipped to California. Ensure you have the necessary tools and knowledge for proper ring gapping and installation before starting your engine build.