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SDPC Raceshop I38307SCSIDF - 383ci Gen4 LS Iron Short Block

• 383ci - 4.000" Stroke X 3.905" Bore
• 5.3L GEN4 Iron Block
• Diamond forged -7cc flat top pistons
• SCAT 4340 steel crank
• SCAT I-beam rods with upgraded bolts
• 58X Reluctor Ring
• Clevite Performance H-Series Rod & Main Bearings
• Durabond Cam Bearings - Premium One Piece Design
Please Call for Availability
Shipping: Free Shipping in the 48-States, 1 to 3 Day Delivery to Most Locations


Compression Ratio Chart – SDPC 383ci LS Short Block with 7cc Flat Top Pistons
Head Gasket Thickness 60cc Combustion Chamber 65cc Combustion Chamber
0.040" 11.36 10.72
0.051" 11.07 10.47
0.060" 10.85 10.27
Nothing beats cubic inches and stroke when it comes to upgrading your LS engine! If you are looking for proven performance from a professional engine shop then you have landed at the right place - the SDPC Raceshop LS short blocks are built using the latest Rottler CNC block machining center and CNC vertical hone for a race prepared blueprinted block and quality controlled cylinder bore finish that is normally found in professional racing engines. The crank, connecting rods, rings and bearings are precision matched and balanced on the latest CWT balancer to insure a vibration free rotating assembly for fast throttle response and proven durability. This 383ci LS short block is a perfect upgrade for your 1999 thru 2006 4.8L or 5.3L Chevrolet and GMC pickup. It also fits between the fenders of a LS1 powered Camaro or Firebird from 1998-2002. Corvette owners from 1997 to 2004 can also this 383 LS short block to upgrade their LS1 or LS6 5.7L engine. No matter what your vehicle, if you are looking for a budget priced stroker LS engine --- you have found the solution here at SDPC.

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California Prop 65WARNING: Cancer & Reproductive Harm -


  • I38307SCSIDF
  • I38307SCSIDF
  • SDPC Raceshop
  • New

Shipping Information

  • Item Requires Shipping
  • 300.0 lbs.
  • W42.0000” x H30.0000” x L26.0000”
  • Free Shipping in the 48-States, 1 to 3 Day Delivery to Most Locations

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