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FREE SHIPPING ON PARTS ORDERS OVER $999
Clears 4.125” stroke w/ steel rod Has two 3/4” NPT drain back ports Comes with all hardware, pick-up tube, gaskets & baffle sheet.
255cc Intake, 95cc Exhaust & 69cc Chambers Virgin A356 Aluminum Castings 6 Bolt Head Casting with Extra Strength Decks Advanced 11° Valve Angle for Maximum Flow & PTV Clearance 2.165” Intake Valve 21-4N Alloy & 1.60” Exhaust Valve 23-8N Super Alloy 23-8N Alloy has the same high temp characteristics of “Inconel” w/o the brittleness Available Complete w/ Chromoly Retainers, Ti Retainers, or Bare w/ Valves Billet Rocker Arm Stands Included - Compatible w/ OEM LS3 Rocker Arms Compati...
IN STOCK & READY TO SHIP!!Smeding Performance is now offering Dart LSN SHP engines blocks in a ready to assemble package! This engine block is fully machined with cam bearings, freeze plugs & oil galley plugs installed. Block is machined for 1/2" Head Studs. Cylinders have been deburred & stroker clearanced as well! Dart PN: 31867212 1/2" Head Stud Threads 4.125" Final Cylinder Bore Diameter CNC Plateau Honed w/ Dual Torque Plates CNC Parallel Surfaced Decks Cylinders Deburred ...
Max Recommend Spring Pressure 520# Open Max Recommend Engine RPM 7,500 Axle Oiling System for High Spring Pressure Security Cold Forged Steel Body Heat Treated for Exceptional Wear Resistance Precision Ground Needle Roller Bearings with High Chromium Steel Axle Cold Forged Extra Long Piston, Precision Ground and Fitted High Flow Disc Style Quick Reacting Check Valve for Better Reaction Precision Oil Metering Assuring Proper Oiling to Rocker Arms Proprietary Tie-Bar System
Max Recommend Spring Pressure 460# Open Max Recommend Engine RPM 8,000 Short Travel Piston Plunger System Cold Forged Steel Body Heat Treated for Exceptional Wear Resistance Precision Ground Needle Roller Bearings with High Chromium Steel Axle Cold Forged Extra Long Piston, Precision Ground and Fitted High Flow Disc Style Quick Reacting Check Valve for Better Reaction Precision Oil Metering Assuring Proper Oiling to Rocker Arms Proprietary Tie-Bar System
Clears most common chassis Clears 3.622” stroke w/ steel rod Comes with all hardware, pick-up tube, gaskets & baffle sheet.
Clears most common chassis Clears 3.622” stroke w/ steel rod Comes with all hardware, pick-up tube, gaskets & baffle sheet.
Cathedral Port R2: .617”/.614” Valve Lift w/ 1.7 Rocker 231/236 Duration @ .050” 112LSA + 4* Advance 2400-2800 Stall Recommended Moderate Chop Cathedral Port R3: .621”/.615” Valve Lift w/ 1.7 Rocker 235/244 Duration @ .050” 114.5LSA + 4.5* Advance 3400+ Stall Recommended MAX Duration for Stock Pistons w/ Unmilled Heads Very Aggressive Chop
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