Delivery Information
We pride ourselves on providing you with the very best delivery service for your RCM Consignment.
We work closely with our logistics partners who will ensure your goods arrive safely and in good time.
For UK based, European & Rest of the World Consignments we use both Royal Mail and DHL Express.
Royal Mail orders must be received by 12.30 noon (UK Time) for same day shipping.(*Subject to availability).
National & International courier orders must be received by 3pm (UK Time) for same day shipping.(*Subject to availability).
Tracking information will be sent to you once your order has been processed, alternatively you can track the consignment using the following web addresses:
UK Shipping Guide
|
Service |
Destination |
Delivery Time |
Consignment Weight |
Trackable |
Details |
|
Royal Mail - 1st Class Post |
UK |
1-2 working days |
Up to 2kg |
No |
|
|
Royal Mail - 1st Class Signed for |
UK |
1-2 working days |
Up to 2kg |
Yes |
Provides proof of delivery |
|
Royal Mail - Special Delivery |
UK |
Next working day before 1pm |
Up to 2kg |
Yes |
Guaranteed Saturday delivery also available if required. |
|
UK Courier - DHL |
UK |
Next working day before 5pm |
Up to 70kg |
Yes |
Longer delivery times for Scottish Highlands & Islands, Isle of Man, Channel Isles & Scilly Isles |
International Shipping Guide
|
Service |
Destination |
Delivery Time |
Consignment Weight |
Trackable |
Details |
|
Royal Mail - International Tracked & Signed for |
International |
5-15 working days |
Up to 2kg |
Yes |
Proof of Delivery can be found on the Royal Mail website |
|
DHL Express |
International |
1-6 working days |
Up to 70kg |
Yes |
Proof of Delivery can be found on the DHL website |
Proof of Delivery can be found on the DHL websiteFor confirmation of DHL international transit times please see https://www.dhlexpress.nl/sites/default/files/dhl_express_transit_times_2022.pdf
Custom Duties & VAT
- The RCM website gives you product pricing including and excluding VAT.
- If you are purchasing goods from within the UK you will be charged VAT at 20%.
- If you are purchasing goods from outside the UK, you will not be charged VAT.
- If purchasing from outside the UK, you will be charged duty and VAT on the goods you have purchased from RCM as it enters your country. It will be the responsibility of the purchaser to make sure these extra charges are paid on entry into the importing country.
DESCRIPTION
Subaru EJ# Line bore Engineering Process
At RCM Engineering, precision is at the heart of everything we do. Our Subaru EJ-series line bore process has been developed and refined over decades of building and maintaining championship-winning engines. Whether it’s a factory EJ20, EJ22, or EJ25, achieving perfect main bearing alignment is critical for reliability, performance, and oil system efficiency.
What is Line boring?
Line boring is the process of machining the main bearing tunnel to ensure absolute alignment across all bearing housings. Over time—or through excessive stress, heat, or improper assembly—the main tunnel can distort. Even a fraction of a millimetre in misalignment can cause bearing wear, increased friction, and reduced oil pressure.
Our Precision Process
At RCM, every EJ block undergoes a meticulous inspection before machining begins.
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Block Preparation: Each case half is ultrasonically cleaned, assembled, and torqued to factory specification using our precision torque plates.
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Measurement and Assessment: Using advanced digital bore gauges and coordinate measuring equipment, we map the existing alignment to identify any deviation from Subaru’s factory geometry.
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Machining: The block is then line bored or line-honed using our in-house CNC equipment, achieving tolerance levels down to a few microns.
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Final Validation: After machining, all measurements are rechecked, ensuring perfect concentricity, bearing crush, and oil clearance.
Why It Matters
A properly line bored EJ block delivers:
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Improved bearing life and oil pressure stability
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Reduced friction and wear under high-load conditions
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Enhanced crankshaft rotation smoothness
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Optimised reliability for both road and race applications
Built for Performance, Proven in Motorsport
Every RCM-engineered line bore process reflects our motorsport heritage. From Time Attack Championship winning engines to bespoke high-performance road builds, our methods ensure each engine performs flawlessly at every RPM.
If you’re rebuilding or upgrading your Subaru EJ engine, RCM’s precision line bore service guarantees the foundation your build deserves.
Payment & Security
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