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Focus ST MK3 Forged Engine Rebuild

£6175 (£5,145.83 ex vat) IN STOCK Finance Options Available

Focus ST MK3 Forged Engine Rebuild

£6175 (£5,145.83 ex vat) IN STOCK Finance Options Available

Add Balance Shaft Delete and Sump Baffle Plate? *

Supply Replacement OE Crankshaft *

Cylinder Head *

Internal Engine Balancing *

250 Mile Scrub-in Service *

More Info
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Product Description

  • Dreamscience Focus ST MK3 Forged Engine Rebuild

    The Dreamscience Focus ST MK3 Forged Engine Rebuild is built for strength, reliability, and serious performance.

    The forging components changed in this specification supports over 500bhp. This makes it ideal for fast road, track, or high-performance road use. You can also add upgrades to increase strength and power capability further.


    Why Choose This Rebuild?

    The Focus ST MK3 engine is known for ringland piston failure, especially on tuned cars.

    In some cases, upgrading to forged pistons and rods is enough. However, if the cylinders are damaged or the bore ovality is out of tolerance, a full rebuild is required.

    This package is designed for those situations.

    We oversize the bores and fit 88mm oversized forged pistons to restore strength and reliability.

    This rebuild is also suitable if your engine has suffered:

    • Bearing wear

    • Bottom-end knock

    • Oil-related damage

    It provides a strong and dependable foundation for future performance upgrades.


    What’s Included in the Package?

    • Professional engine block oversizing (using your original block)

    • Cylinder bore machining to correct ovality or damage

    • Crankshaft inspection, check, and polish

    • ARP head bolts

    • ARP main bolts

    • Skim and pressure test of your cylinder head

    • 88mm Mahle forged pistons (standard compression ratio)

    • Dreamscience Compstar connecting rods

    • Main bearings (King Racing or equivalent)

    • Big end bearings (King Racing or equivalent)

    • Iridium spark plugs

    • OEM water pump

    • OEM oil pump

    • OEM gasket and seal kit

    • OEM crank hub bolt

    • OEM auxiliary belt

    • Miller C.R.O running-in oil

    • OEM oil filter

    • OEM sump plug

    • Full professional assembly labour


    Optional Upgrades

    You can add the following options using the drop-down menu:

    • Internal balancing

    • Brand new OE crankshaft

    • Cylinder head rebuild

    • Brand new cylinder head

    • Balance shaft delete

    • Sump baffle plate

    • 250 Mile Scrub-in Service

    Additional Info

  • Payments over 2.5k are via Bank Transfer Only
  • Contact our team on sales@dreamscience.co.uk if you have any questions on this rebuild option.
  • Videos of our engine rebuilding services can be found on our Instagram or TikTok pages
  • FER Membership – We are proud to be Approved Members of the Federation of Engine Re-Manufacturers (FER), the UK’s only trade body for the engine reconditioning industry. This accreditation demonstrates our commitment to quality, professionalism, and industry best practice.
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