ATK Chevy LQ4 6.0L 460 HP HP93 Stage 1 Aluminum Head LB

Description

Reinforcing compromised aluminum cylinder blocks requires the ATK Chevy LQ4 6.0L 460 HP HP93 Stage 1 Aluminum Head LB and its durable cast iron architecture. Achieve consistent ring sealing during aggressive highway pulls. This build utilizes a heavily fortified OEM casting to support demanding street applications safely.

Engine Architecture & Core Specifications

• Block Material: Cast iron Chevy LS-series 6.0L.
• Cylinder Heads: High-performance aluminum cylinder heads.
• Compression Ratio: 9.5:1 advertised compression ratio.
• Bore & Stroke: 4.000 inch bore x 3.622 inch stroke (364 CID / 6.0L).
• Rotating Assembly: Internal balance with a hydraulic roller camshaft.

Component Breakdown: Base Long Block

This assembled base long block provides a powerful foundation for heavy duty truck repowers and high performance LS swaps.

• A precision machined cast iron block houses a robust hydraulic roller camshaft designed to deliver massive torque for towing and street performance.
• Lightweight aluminum cylinder heads improve overall thermal efficiency while strict block cleaning procedures ensure reliable head gasket sealing over the life of the engine.

Vehicle Fitment & Compatibility Matrix

Designed to drop seamlessly into the factory engine bay this 6.0L block aligns perfectly with standard LS motor mounts. Utilizing one of our heavy-duty LS crate engines bypasses complex chassis fabrication entirely.

• Fits 1999-2007 Chevrolet Silverado 2500 models replacing tired LQ4 blocks perfectly.
• Fits 2003-2007 Chevrolet Express 2500 chassis acting as a direct fit performance replacement.
• Fits 1999-2007 GMC Sierra 2500 pickup trucks looking for aggressive towing power.
• Fits custom LS swap restomod applications requiring a reliable 6.0L foundation.

Fuel & Ignition System Requirements

Supplying adequate fuel volume to this high output LS engine requires capable electronic fuel pumps and massive injectors.

• An upgraded high pressure electronic fuel pump is required to supply the fuel injection system while utilizing 91 Octane premium pump gas prevents detonation.
• The engine accepts standard OEM coil packs without any modification to provide reliable spark delivery under load.

Installation, Break-In Oil & Priming Instructions

Professional mechanical preparation separates a successful engine build from a catastrophic premature failure.

• Transfer your existing intake manifold and accessories using fresh gaskets before manually priming the oil system with a dedicated priming tool until pressure is verified.
• Fill the crankcase with a premium high zinc break in oil and perform an immediate flush after the first complete heat cycle.

USA Warranty, Emissions & Logistics

Fulfilling this order demands a verifiable factory core and strict adherence to federal off-road regulations.

• Backed by a 24-Month or Unlimited-Mile warranty this package offers extensive coverage against assembly defects when documented installation procedures are followed.
• Designated strictly for Race Use Only this package ships via LTL Freight requiring a commercial address with a forklift or liftgate service.