LS 5.3 Aluminum Block Turbo Engine & TH400 Automatic Transmission Complete Powertrain Package

GM 5.3L Aluminum Block Turbo Engine & TH400 Automatic Transmission Complete Powertrain Package

Ready to drop a bulletproof, boost-ready powerhouse into your street weapon, drag car, or custom project? This elite, custom-built 5.3L Aluminum Block Turbo Engine and TH400 automatic transmission package is engineered to handle massive boost and deliver relentless strip-shredding performance.

Built using a highly desirable, lightweight all-aluminum 5.3L Gen IV block foundation, this engine sheds significant weight off the front end of your chassis compared to heavy iron-block setups. Professionally machined and prepped specifically for forced induction, every critical internal component has been upgraded with premium aftermarket hardware to ensure absolute reliability under high boost pressures. Paired with the legendary strength of a Turbo 400 gearbox, this turn-key powertrain combo is the ultimate choice for drag racing, roll racing, and high-horsepower street builds in both the American and Australian markets.

Technical Specifications & Performance Upgrades

Custom Boost-Prepped 5.3L Aluminum V8 Engine

• Block Material: High-strength, lightweight cast aluminum block—ideal for optimizing front-to-rear weight distribution on custom swap chassis.

• Piston Rings: Brand new performance piston rings, custom gapped for forced induction to eliminate ring-butt and maximize compression sealing under heavy boost.

• Bearings: Brand new, heavy-duty main and connecting rod bearings clearanced perfectly for high-performance use.

• Fasteners: Outfitted with all-new premium ARP hardware (including high-tensile ARP rod bolts and main studs) to eliminate cap walk and handle extreme cylinder pressures without stretching.

• Camshaft: BTR (Brian Tooley Racing) Stage 2 Turbo Camshaft — mathematically optimized to maximize exhaust scavenging, deliver explosive mid-to-high RPM power, and maintain excellent valve control under high boost.

• Valvetrain: Factory-strong GM stock rocker arm assembly, offering exceptional rigidity and proven high-RPM reliability without the added weight or complexity of aftermarket configurations.

TH400 (Turbo 400) Automatic Transmission

• Transmission Class: Heavy-Duty 3-Speed Automatic Performance Gearbox.

• Track Reputation: Widely recognized across the global drag racing community as an indestructible transmission platform. Built with minimal parasitic power loss and massive internal torque capacity, it effortlessly transfers intense, instantaneous turbo power directly to the rear wheels.

The Ultimate Forced Induction Swap Platform

• Built to Boost out of the Box: Skip the high costs, teardown down-time, and mechanical headaches of trying to prep a stock junkyard engine for a turbocharger. With gapped rings, upgraded bearings, and a dedicated BTR turbo cam already installed, this long block is structurally ready for your turbo manifold and hot side kit from day one.

• The Aluminum Weight Advantage: By switching from a traditional iron block to this premium aluminum architecture, you strip roughly 80–100 lbs off the nose of your car. This drastically improves your vehicle’s braking dynamics, front-end lift control, and cornering performance.

• Maximum Valvetrain & Fastener Insurance: Utilizing absolute industry-standard ARP structural fasteners guarantees that your cylinder heads and bottom end remain locked tight under intense boost, preventing blown head gaskets and catastrophic engine failures.

Assembly Status & Logistics

This high-performance turbo powertrain package has been meticulously clean-prepped, precision clearanced, and assembled in a sterile clean-room environment. Vital line inlets, oil ports, and open passages are completely sealed for safe, contaminant-free delivery.

Package Includes: Complete aluminum 5.3L turbo-prepped engine assembly (oil pan to valve covers), BTR stage 2 turbo cam, full ARP hardware kit, stock rocker arms, and the high-strength matching TH400 automatic transmission.

We provide secure, heavy-duty palletization enclosed in a protective crate with fully insured domestic freight options across the United States, as well as direct containerized ocean freight to all major Australian ports. Contact us with your zip or postal code today for a fast, competitive shipping quote!