• Mazworx 4B11 cylinder head with cam caps installed. Customer-core service example; pictured hardware varies.
  • Mazworx 4B11 combustion chambers and valves. Customer-core service example; pictured hardware varies.
  • Mazworx 4B11 cylinder-head angled view. Customer-core service example; pictured hardware varies.
  • Mazworx 4B11 valves viewed through a port. Customer-core service example; pictured hardware varies.
  • Mazworx 4B11 cylinder-head port detail. Customer-core service example; pictured hardware varies.
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MazWorx Authorized Dealer

Mazworx 4B11 Head Stage 3 Service  Customer-supplied camshafts

Mazworx 4B11 Head Stage 3 Service

$4,030.32
$4,030.32
Sale Sold out
Camshafts

Out of stock

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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.

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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.

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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 4B11 cylinder head; valve buckets. Confirm compatibility and condition before ordering.

The customer-supplied camshaft option requires compatible cams for assembly and valve setup.

Service work and components

  • Complete disassembly of the cylinder head
  • Thorough hot tank cleaning to remove all deposits
  • Removal, drilling, tapping, and replacement of oil port plugs to ensure optimal oil flow and sealing
  • Machining for freeze plug threads
  • Stage 3 CNC porting and combustion chamber work
  • Line boring of billet cam cap for precise camshaft alignment
  • Removal, reinstallation, and reaming of valve guides to factory specifications
  • Replacement of intake valve seats for optimal sealing and flow
  • Multi-angle valve job
  • Setting valve lash and valve tip clearance for accurate valvetrain operation
  • Resurfacing the cylinder head to ensure a perfect sealing surface
  • Reassembly of the cylinder head using components
  • Supertech intake valves sized +1mm for increased flow capacity
  • Supertech exhaust valves made from Inconel, also +1mm
  • Supertech titanium valve retainers for reduced valvetrain mass and enhanced performance
  • Supertech dual valve spring kit rated at 85 lbs to handle increased valve lift and RPM
  • Supertech bronze valve guides
  • Supertech valve stem seals to maintain proper lubrication without leakage
  • Billet cam cap
  • Various necessary plugs for proper sealing and function

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.

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Vehicle fitment