427ci LSx Boosted Competition Short Block $8,999 - The LSx 427ci competition short block uses a new Dart SHP Pro cast iron block with 4.125″ bore to produce the 427ci. 427ci LSx Boosted Competition Short Block quantity Add to cart Categories: LSx Competition Boosted Short Blocks, LSx Crate Engines, LSx Short Blocks ENGINE SPECIFICATIONS Block: New Dart SHP Pro LS Block Honed with Torque Plates Bore Size 4.130″ Resurfaced to Match Pistons Line Honed with ARP Main Studs Blueprinted Oil Clearances All New GM Block Plugs Installed New Durabond Cam Bearings Installed Pistons: Wiseco Custom Forged Boost Pistons Bearings: King H-Series Main and Rod Bearings Crank: Callies Comp Star 4340 Forged Steel 8 Counterweight Stroke 4.000” Your Choice of 24x or 58x Reluctor Wheel (Billet 24X Reluctor Wheel is an Extra $150″) Internally Balanced Front and Rear Rods: Callies Comp Star Extreme 4340 Forged Steel H-Beam 6.125” Length ARP 2000 Rod Bolts Technical Links: (Coming Soon) Installing Windage Tray, Oil Pump Pick Up and Covers Installing LS Harmonic Balancer Torque Specs for Entire Engine How to Set Pushrod Preload on LS Engine How to Properly Prime the LS Oil Pump Recommendations; Oil, filter, spark plugs Hey there, power seekers! Get ready to be blown away by the Golen Engine 427ci LSx Boosted Competition Short Block. Our LS7 short block for sale is a true marvel for those who crave serious horsepower. We’re talking a build that can handle up to an astonishing 1000hp. At the heart of this LS7 short block lies a robust base, ready for the toughest of boosts, with ARP main studs and top-notch cam bearings. Featuring a Callies Comp Star 4340 forged steel crankshaft and H-Beam rods, reinforced with ARP 2000 rod bolts, this engine is designed to withstand extreme power. The use of Wiseco 2618 forged pistons and GFX ring sets makes it ideal for high-pressure boosted environments. Fully balanced and blueprinted, and assembled with King bearings, this engine is fine-tuned for peak performance under any condition. This built LS7 short block is engineered to handle boosts up to 20 psi effortlessly, be it from superchargers or turbos. Need to complete your monster build? We offer everything, from Cometic MLS head gaskets to ARP Head studs, and our Golen Engine Aftermarket LS3 CNC Ported heads with thick decks, perfect for sealing in that boost. And don’t sweat the assembly – we’ve got full tech support, plus a wealth of tech links and videos for those off-hours queries. The Golen Engine 427ci LSx Boosted Competition Short Block isn’t just an engine; it’s a ticket to a 1000hp journey. Let’s build that dream machine!