454ci LSx Competition Short Block



The LSx 454ci competition short block uses a new Dart SHP Pro cast iron block with 4.185″ bore and 4.125” Stroke to produce the large 454ci.

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  • New Dart SHP Pro Cast Iron Block Honed with Torque Plates (Dart aluminum or Concept Performance LSr Aluminum blocks available as upgrade)
  • Bore Size 4.185″
  • Resurfaced to Match Pistons
  • Line Honed with ARP Main Studs
  • Blueprinted Oil Clearances
  • All New GM Block Plugs Installed
  • New Durabond Cam Bearings Installed


  • Wiseco Forged Pistons with Anti-Friction Coating


  • King H-Series Main and Rod Bearings


  • Callies Comp Star 4340 Forged Steel
  • Stroke 4.125”
  • Your Choice of 24x or 58x Reluctor Wheel (Billet 24X Reluctor Wheel is an Extra $150″)
  • Internally Balanced Front and Rear


  • Callies Comp Star 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 motor maniacs! Let’s talk about the Golen Engine 454ci LSx Competition Short Block, a real heavy hitter in the engine world. This bad boy starts with a Dart SHP Pro cast iron block, sturdy as they come. But hey, if you’re looking to go even bigger, we’ve got Dart Aluminum or Concept Performance LSr Aluminum blocks as upgrades.

Inside, we’re talking about a Callies Comp Star 4340 forged steel 4.125″ Stroke crankshaft and H-Beam rods with ARP 2000 rod bolts – talk about strength and durability! And for pistons? We use Wiseco 2618 forged pistons with their GFX Ring Set, guaranteeing top-notch performance.

But that’s not all. This engine’s rigged with ARP Main studs and King Performance bearings, because we know you need your engine to be smooth and reliable. And when it comes to finishing your build, we’ve got your back with everything from hydraulic roller camshafts and lifters, to Cloyes Billet Timing Sets, all the gaskets you’ll need, and our own Golen Engine Aftermarket 6-Bolt LS3 CNC ported heads. These heads flow 380 cfm on the intake side and can help you reach a whopping 700hp.

And don’t worry about putting it all together – our full tech support is here to help you get that engine purring. So, if you’re ready to build a beast of an engine, the Golen Engine 454ci LSx Competition Short Block is your ticket to the big leagues. Let’s get wrenching!

Additional information

Weight 350 lbs
Dimensions 38 × 26 × 27 in