• Mazworx assembled rb26 long block example. Customer-core service example; pictured hardware varies.
  • Mazworx rb26 front cover detail. Customer-core service example; pictured hardware varies.
  • Mazworx long block side view. Customer-core service example; pictured hardware varies.
  • Mazworx long block front and upper view. Customer-core service example; pictured hardware varies.
  • Mazworx RB26DETT Port Cover Kit 11370, installation view.
  • Mazworx valve covers and oil cap. Customer-core service example; pictured hardware varies.
  • Mazworx RB26DETT Port Cover Kit 11370, installation view.
  • Mazworx engine rear-face and plug detail. Customer-core service example; pictured hardware varies.
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MazWorx Authorized Dealer

Mazworx RB26DETT Long Block Stage 2.5 Service

Mazworx RB26DETT Long Block Stage 2.5 Service

$19,686.57
$19,686.57
Sale Sold out
Configuration

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.

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 complete RB26 core long block. Confirm compatibility and condition before ordering.

Service work and components

  • Complete disassembly and cleaning of the short block
  • Hot tank cleaning and preparation of all major components
  • Sandblasting and painting of the iron block
  • Machining for threaded oil port plugs
  • Machining for threaded freeze plugs
  • Precision block resurfacing
  • Cylinder resizing using a torque plate for accurate bore geometry
  • Line bore honing for proper crankshaft alignment and bearing clearances
  • Installation of an oil pump collar on the crankshaft when required
  • Cleaning, inspection, polishing, and balancing of the crankshaft
  • Complete short block assembly
  • Custom HD CP pistons, 86.5mm with a 9:1 compression ratio
  • Upgraded 9310 wrist pins with a .250″ wall thickness and 22mm diameter
  • BC ProH625+ connecting rods with 22mm wrist pins
  • ACL race bearings
  • ARP main studs
  • Mazworx threaded and O-ringed small plugs
  • Mazworx threaded and O-ringed freeze plug kit
  • Complete cylinder head disassembly
  • Sandblasting and preparation of the cylinder head
  • Removal, drilling, tapping, and replacement of oil port plugs
  • Stage 3 CNC porting and combustion chamber machining
  • Camshaft clearancing
  • Removal, reinstallation, and reaming of valve guides
  • Race-grade valve job
  • Precision valve lash adjustment
  • Cylinder head resurfacing
  • Complete cylinder head assembly
  • Kelford 184-SE camshafts with 288°/292° duration and 11.1mm lift
  • Kelford DLC-coated cam followers
  • Supertech +1mm intake valves
  • Supertech +1mm Inconel exhaust valves
  • Supertech bronze valve guides
  • Kelford RB26DETT beehive valve spring and titanium retainer kit with 105 lb spring pressure
  • Supertech valve seals
  • Mazworx threaded freeze plugs
  • Additional plugs as required
  • ATI Super Damper
  • ARP crank bolt
  • HKS upgraded oil pump
  • Tomei oil pan baffle
  • LeaskSpec oil pan extension
  • HKS Fine Tune timing belt
  • Apexi 88mm x 1.5mm head gasket
  • Kelford adjustable cam gears
  • OEM water pump
  • ARP CA625+ head studs
  • OEM timing belt pulleys
  • HKS 36-2 trigger kit
  • Powder coated valve cover and timing cover
  • Mazworx bolt kit
  • Break-in oil and filter included
  • Engine is spun and primed prior to delivery

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