Speedmaster Chevy LS 6.0L Gen IV 6-Bolt Billet Main Iron Engine Block; 4-Inch Bore

OverviewThe next level of performance are these cast-iron Chevy LS blocks. Designed to look standard under your bonnet, and work with stock components. The Speedmaster block is ready for the street racer or all-out racer with added strength and cubic inches. All the factory flaws redesigned to be eliminated, while still using the water jacket design. The Speedmaster blocks are cast from high-density iron with extra-thick cylinder walls and decks.SpecsBrand: SpeedmasterPart Number: PCE286.1058.01Part Type: Engines, Bare BlockCylinder Bore Diameter: 4.000 in.Bore & Stroke: 3.622 in. x 4.000 in. Max RecommendedCam Journal OD: 2.164 in. - 2.166 in.Deck Height: 9.240 in.Fuel Pump : ElectricalFuel Pump Pushrod: N/ALifter Bores (in.): 0.843 in. - 0.844 in.Main Bearing Size (in.): 2.558 in.-2.559 in.Main Bearing Bore (in.): 2.750 in.-2.751 in.Main Cap Bolts: 6 BoltMain Cap Press: 0.005 in.Oil System: Wet SumpOil Pan: Standard LSRear Main Seal (in.): Standard LS 4.527 in.Starter: Standard LSStud Holes, Head: Blind HolesTiming Chain/Gears: Standard LS ComponentsTiming Cover: Standard Cam Location LSWeight: 205 Lbs @ 4.0 in. BoreQuantity: Sold individually.Notes: Check hood clearance before installing. No provision for Active Fuel Management

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