• Mazworx sleeved cylinder block, angled view. Customer-core service example; pictured hardware varies.
  • Mazworx sleeved cylinder block opposite side. Customer-core service example; pictured hardware varies.
  • Mazworx main bearing tunnel, underside view. Customer-core service example; pictured hardware varies.
  • Mazworx main bearing saddle close-up. Customer-core service example; pictured hardware varies.
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MazWorx Authorized Dealer

Mazworx G4KF Sleeved Block Stage 2 Service

Mazworx G4KF Sleeved Block Stage 2 Service

$2,342.82
$2,342.82
Sale Sold out
Configuration

Out of stock

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This item is currently unavailable. Ask us about availability or help finding a suitable replacement.

Ask about availability or fitment

Year, make, model and engine help us check fitment.

We'll reply to your inquiry by email. This is not an automatic restock alert.

Shipping & returns

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Shipping details

In-stock orders are processed within 48 hours; transit time is additional.

International orders include export processing and customs clearance. Duties, taxes and brokerage are extra; final freight charges may change after remeasurement.

Read the shipping policy

Returns

Need help with a return? Request authorization within 30 days of delivery for eligible unused, uninstalled items. See details for exclusions and applicable fees.

Read the full return policy
Return details & how to start

Request return authorization (RMA) within 30 days of delivery for eligible items. Keep items unused and uninstalled, with original packaging and accessories. Electronics, liquids, special orders and other categories are excluded.

Email sales@frsport.com with RETURN and your order number in the subject to request an RMA. Please wait for return authorization before sending your item back.

Wrong part/size or change of mind: a 20% return processing fee applies, plus applicable shipping costs.

Original shipping is non-refundable. For orders shipped free, the actual outbound shipping cost is deducted from the refund. Return shipping is prepaid by the customer.

After payment capture, cancellations and refunds generally incur a 5% processing fee, except for our error, confirmed defects or confirmed carrier loss. The 5% and 20% fees do not stack; only the greater applicable fee applies. Store credit waives the 5% fee, but applicable return fees remain.

Missing, incorrect or transit-damaged items: report within 3 business days of receipt with photos of the product and packaging.

For defective items, contact us for help with the manufacturer's warranty process. The manufacturer decides the claim.

Specifications

Product details shared across all variants.

Category
Car Repair & Maintenance

This service uses customer-provided engine components. A replacement core is not included.

Provide G4KF core block. Confirm compatibility and condition before ordering.

Service work and components

  • Removal, retapping, and replacement of the oil port plug
  • Installation of Darton MID sleeves to strengthen cylinder walls
  • Precise resizing of cylinders to exact tolerances
  • Use of a torque plate during honing to simulate cylinder head stress and ensure accuracy
  • Step decking to adjust deck height for proper piston-to-head clearance
  • Resizing of line bore to maintain crankshaft alignment and bearing fitment
  • ARP main studs
  • Darton MID sleeves
  • Miscellaneous plugs to restore sealing and pressure control

Confirm delivery arrangements before sending parts. Work starts only after the individual intake is approved.

Additional work and replacement parts need approval. Core credit requests require individual approval. No automatic core credit is included.

Photos show manufacturer work examples. The service uses customer-provided cores. Selected options and listed components define the supplied work.

View full details

Vehicle fitment