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 your piston and cylinder bore and carefully file the ends of the rings to achieve the correct gap specification for your engine build. This allows for precise tuning of ring seal.

Are these rings compatible with all EJ205 and EJ257 engines?

These rings are specifically for EJ205 WRX and EJ257 WRX STi engines that utilize a 100mm bore. It's important to confirm your engine's bore size and specific model application before purchasing.

What else might I need when installing these piston rings?

When installing piston rings, you'll need a piston ring compressor to safely install the rings onto the pistons. Proper ring gapping tools, such as a ring groover and a fine-tooth file, are also essential for the file-fit design. Always refer to your engine's service manual for specific installation procedures and specifications.

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Specifications

Brand: Manley Performance
Part #: 461000dt-4
UPC: 807298101163

Manley Ring Set Subaru EJ205WRX / EJ257 WRX STi 100mm File Fit 1.2mm x 1.2mm x 2.0mm - Set of 4

Name: Manley Ring Set Subaru EJ205WRX / EJ257 WRX STi 100mm File Fit 1.2mm x 1.2mm x 2.0mm - Set of 4
Brand: Manley Performance
SKU: manley-performance-manley-ring-set-subaru-ej205wrx-ej257-wrx-sti-100mm-file-fit--t14-130590
Price: 184.03 USD
Availability: InStock

$184.03

Only 5 left in stock

Manley Piston Ring Set for Subaru WRX STi EJ205/EJ257 engines. 100mm bore, file fit rings for engine rebuilds.

Key Features

Fits Subaru EJ205 WRX and EJ257 WRX STi engines.
Designed for a 100mm cylinder bore.
Features a file-fit configuration for custom gapping.
Ring dimensions are 1.2mm (top), 1.2mm (second), and 2.0mm (oil).
Set includes rings for one complete engine (4 cylinders).
Manley Performance is a popular brand for engine components.

These piston rings are designed for Subaru EJ205 WRX and EJ257 WRX STi engines with a 100mm bore. Not CARB approved; cannot ship to California.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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About this part

Product Details

This is a set of four Manley Piston Rings designed for Subaru EJ205 WRX and EJ257 WRX STi engines with a 100mm bore. These rings feature a file-fit configuration, 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 2.0mm for the oil ring.

When you're rebuilding the top end of your EJ205 or EJ257, getting the right piston rings is crucial for proper engine sealing and performance. Manley is a well-known name in performance engine components, and these rings are built to handle the demands of these turbocharged Subaru engines. The file-fit design gives you the flexibility to achieve precise ring gaps, which is important for controlling blow-by and oil consumption, especially in modified applications.

Remember 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, as this is a critical step in any engine rebuild.