Shafiroff Racing 427 LSX SC UltraStreet Short Block

Shafiroff Racing 427 LSX SC UltraStreet Short Block Basic Short Shown

Hand Built & Individually Assembled!
427 LSX S/C $

Our Ultrastreet Short Blocks Are Designed And Built For The LS Enthusiast That Only Wants The Finest Of Components Along With True Race Engine Level Of Machine Work. Square Milled Decks, Plate Honed Cylinders And Line Honed Main Saddles Are The Extra Touches That Set These Short Blocks Apart. Add In Callies/Compstar Crank And Compstar H-Beam Rods With Custom Diamond Pistons For The Trifecta Of Quality And Strength In An LS Short Block!

  • Bore & Stroke
  • Compression Ratio
  • 4.125 x 4.000
  • See Chart Below

Chamber Volume66cc68cc70cc
.040" Gasket9.909.739.56
.045" Gasket9.809.639.46
.051" Gasket9.689.519.35

  • GM Performance LSX Block w/6 Bolt Steel Billet Caps
  • Callies/CompStar 4340 Forged Steel Crank w/58T Reluctor Wheel (1)(2)
  • Callies/CompStar 4340 6.125" H-Beam Forged Steel Rods w/ARP 2000 Bolts
  • Custom Diamond 2618 Forged Aluminum Pistons w/Coated Skirts
  • 1.2/1.2/3.0MM Premium Ring Set
  • Clevite 77 H-Series Main & Rod Bearings
  • Internally Balanced w/Mallory Heavy Metal
  • Professionally Blueprinted and Assembled
Camshaft Installation Package$750
Includes: Custom SSRE/Comp Cam Steel Billet Hydraulic Roller Cam, Cam Thrust Plate & Cloyes 9-3672TX9 Single Roller Timing Set. Camshaft Installed and Degreed.

Custom Designed Camshaft Profile Based On Your Individual Application.
Package Options
Cloyes 9-3672TX9Z Timing Set w/Single Roller "Z" Chain and Steel Billet Sprockets $125
Additional Parts - Labor - Accessories
Callies CompStar 4340 Forged Steel Crank w/24 or 58T Reluctor Wheel $250
Callies Magnum 4340 Forged Steel Crank w/24 or 58T Reluctor Wheel $1395
Connecting Rods
Callies Ultra H-Beam 4330M Timken Steel Rods $695
Callies Ultra I-Beam 4330M Timken Steel Rods $1250
Pistons - Pins - Rings - Bearings
H13 Tool Steel Wrist Pins $250
Total Seal Stainless Steel Top Ring, Napier 2nd Ring & 3MM Oil Ring Set $175
Gaskets - Fasteners
Cometic MLS (Multi Layered Steel) Head Gaskets (.040/.045/.051 Thickness) Each$95
ARP Main Stud Kit (Installed Before Machine Work) $295