• Mazworx SR20 short-block front angle. Customer-core service example; pictured hardware varies.
  • Mazworx SR20 short-block opposite angle. Customer-core service example; pictured hardware varies.
  • Mazworx SR20 short-block piston deck view. Customer-core service example; pictured hardware varies.
  • Mazworx SR20 short-block underside and girdle. Customer-core service example; pictured hardware varies.
  • Mazworx SR20 billet front-cover detail. Customer-core service example; pictured hardware varies.
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MazWorx Authorized Dealer

Mazworx Stage 3 Short Block SR20 RWD Service  No

Mazworx Stage 3 Short Block SR20 RWD Service

$8,436.57
$8,436.57
Sale Sold out
Carrillo CARR-bolt rod upgrade

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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 SR20 RWD core block. Confirm compatibility and condition before ordering.

Service work and components

  • Complete disassembly and hot tank cleaning of the core short block
  • Sandblasting the block for surface preparation
  • Removal, retapping, and replacement of oil port plugs
  • Machining for threaded freeze plugs and plugging the RWD oil drain
  • Machining the block for 1/2″ studs, installing Darton sleeves, and resizing cylinders using a torque plate for accuracy
  • Step decking and line boring to exact specifications
  • Oil groove machining specific to the SR20 platform and machining for 19mm rod bearings
  • Crankshaft cleaning, checking, polishing, and balancing
  • Final assembly of the short block with all performance parts
  • CP Pistons at 90mm with a 9:1 compression ratio (adjustable as needed) and upgraded wrist pins with a .200″ wall
  • Mazworx billet 91mm stroker crankshaft
  • Darton sleeved cylinders
  • Calico coated ACL race bearings to withstand high stress
  • SR20VE oil pump for optimized lubrication
  • Mazworx billet main caps and girdle for increased block rigidity
  • Mazworx main stud kit and threaded, O-ringed freeze plug kit for reliability and sealing
  • Mazworx front oil squirter designed specifically for the SR20 block
  • Billet breather adapter and various plugs to complete the assembly
  • BC ProH625+ connecting rods; the selected Carrillo upgrade replaces the base rods

Selected options define the supplied work and component upgrades. Unselected extras are not included.

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