No Image Available

SDPC Raceshop I38307CSSIDA - LS 383ci Gen3 Iron Short Block Assembly

Free shipping in the 48 states on all LS Short Blocks and LS Engines from the SDPC Raceshop.

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 use this 383 LS short block to upgrade their LS1 or LS6 5.7L engine. This LS stroker short block could also be used as the foundation for your next LS retrofit install and custom engine build. No matter what your vehicle, if you are looking for a budget priced stroker LS engine --- you have found the solution here at SDPC. Call our Team of Experts to determine the right LS engine or short block for your application.

Desc/CI  LS 24X/383CI 
Block 5.3L Iron GEN3
Bore 3.905"
Crank Material/Stroke 4340/4.000"
Rod/Length Scat I-Beam/6.125"
Piston Desc -7cc Flat Top
Piston Material Forged 2618 Alum
Ring Size 1.5/1.5/3.00MM


Please Call for Availability
Availability: Hundreds of LS Engines and Blueprinted Raceshop LS Short Blocks in stock. Ship today service!
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

    • 5.3L LS GEN3 Iron Block 3.905" Bore
    • Diamond Forged -7cc Flat Top Pistons
    • SDPC LS 4340 4.000" Steel Crank
    • 6.125" I-Beam High Performance Connecting Rods with ARP Bolts
    • 24X Reluctor Ring
    • Clevite Performance H-Series Rod & Main Bearings
    • Durabond Cam Bearings - Premium One Piece Design
    • Includes 6-Quarts of Maxima Break-in Oil

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 and engines are built using the latest Rottler CNC block machining center and the Rottler H75X CNC vertical hone for a race prepared blueprinted block and a computer controlled cylinder bore finish that is normally only 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. All clearances are precisely measured and recorded to each serial numbered assembly.Before any parts can be installed in one of our engine and short block programs, all components are thoroughly evaluated and tested in our SuperFlow Powermark 902 dyno room testing facility. You can count on proven performance and durability from actual testing of parts at the SDPC Raceshop. The Raceshop Team has over 150-years of engine assembly, testing and racing experience. Professional experience you can depend on when your short block and engine is assembled in the SDPC Raceshop.

California Proposition 65

California Prop 65WARNING: Cancer & Reproductive Harm -


  • I38307CSSIDA
  • I38307CSSIDA
  • SDPC Raceshop
  • Hundreds of LS Engines and Blueprinted Raceshop LS Short Blocks in stock. Ship today service!
  • 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

Customer Reviews

Comment Total Reviews (0)

Write the First Review!

You must login to post a review.

  • Have a question? Ask the Pros
  • 1-800-456-0211Mon-Fri - 8am-6pm CST
    Sat-Sun - Closed
  • Shop With Confidence We Proudly Accept: