• Mazworx SR20DET assembled long-block front view. Customer-core service example; pictured hardware varies.
  • Mazworx SR20DET assembled long-block upper view. Customer-core service example; pictured hardware varies.
  • Mazworx SR20DET assembled long-block side view. Customer-core service example; pictured hardware varies.
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MazWorx Authorized Dealer

Mazworx SR20DET RWD Long Block Stage 2 Service (Engine: S13)  No

Mazworx SR20DET RWD Long Block Stage 2 Service (Engine: S13)

$12,936.57
$12,936.57
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91 mm stroker crank

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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 SR20DET RWD core long block. Confirm compatibility and condition before ordering.

New rocker arms are not included.

Service work and components

  • Complete disassembly and hot tank cleaning of block components
  • Sand blasting the block for surface prep
  • Removal, retapping, and replacement of oil port plugs
  • Machining for installation of threaded freeze plugs
  • Installation of Darton sleeves and precise cylinder resizing with torque plate honing
  • Step decking and line bore resizing to exact specifications
  • Oil groove machining tailored for the SR20
  • Crankshaft cleaning, inspection, polishing, and balancing
  • Final assembly of the short block
  • CP 90mm pistons with 9:1 compression ratio and upgraded .200″ wall wrist pins
  • BC Pro625+ connecting rods
  • ACL race bearings
  • SR20DET S14 oil pump
  • Darton sleeves
  • Mazworx SR20 main stud kit
  • Mazworx threaded and O-ringed freeze plug kit
  • Mazworx front oil squirter specific to SR20
  • Mazworx billet breather adapter
  • Mazworx -10AN water pipe or plug alongside miscellaneous plugs
  • Disassembly and hot tank cleaning
  • Removal, drilling, tapping, and replacement of oil port plugs specific to SR architecture
  • Machining for threaded freeze plugs
  • CNC porting and combustion chamber work for optimized flow
  • Valve guide removal, reinstallation, and reaming
  • Multi-angle valve job
  • Grinding of rockers for dual guide compatibility and precise rocker level setting
  • Resurfacing and full head assembly
  • Supertech +1mm intake valves
  • Supertech Iconel +1mm exhaust valves with 6mm stems
  • Supertech titanium valve retainers
  • Supertech dual spring kit rated at 90lbs
  • Supertech bronze valve guides and valve stem seals
  • Kelford camshaft set (HLA 188-B) with 268° intake and 272° exhaust duration
  • Miscellaneous plugs and freeze plugs
  • Complete long block assembly
  • Spin and prime process with break-in oil
  • Verification of oil flow and pressure
  • Mazworx/Apexi full grommet head gasket (91mm x 1.2mm)
  • ATI SR20 RWD street damper
  • Timing chain kit with Mazworx timing chain tensioner
  • Mazworx SR20 engine bolt kit
  • Kelford adjustable cam gears (S14/S15 models include one Kelford and one OEM VTC gear)
  • GReddy high capacity oil pan
  • Valve cover powder coating and service including Mazworx valve cover washer kit
  • Miscellaneous seals and gaskets

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