1999 Pontiac Trans Am 5.7L LS1 Engine – Complete Aluminum V8 & T-56 6-Speed Manual Package
For custom restomod builders, high-performance car customizers, and track-day enthusiasts, investing in a complete 1999 Pontiac Trans Am 5.7L LS1 Engine drivetrain package unlocks one of the most celebrated and highly adaptable naturally aspirated sports car platforms ever engineered. Sourced directly from a running 1999 Pontiac Trans Am showing 144,540 original miles, this comprehensive powertrain features the lightweight Gen III small-block F-body platform paired alongside its original heavy-duty Tremec T-56 six-speed manual gearbox. Selecting a complete standalone 1999 Pontiac Trans Am 5.7L LS1 Engine pullout assembly streamlines your vehicle conversion project, delivering the entire mechanical block, transmission core, and electronic management sensors together to eliminate the immense hidden costs of sourcing compatible shift linkages, computer modules, and front accessory brackets separately.https://perlicanparts.org/auto-parts-store-about/
Pulled from a 1999 Pontiac Trans Am with 144,540 miles, this complete 5.7L LS1 engine and T-56 6-speed manual transmission is perfect for custom builds, project vehicles, or LS swap enthusiasts. The package includes all major components for a smooth installation and dependable performance.
Listing Includes:
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Complete 5.7L LS1 Engine (Oil Pan to Intake)
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T-56 6-Speed Manual Transmission
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Belt Drive with Accessories:
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Alternator
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A/C Compressor
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Starter
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Power Steering Pump
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MAF Sensor
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Computer / ECU
This engine and transmission combo offers a turn-key solution for anyone looking to install a classic LS1/T56 drivetrain, ready for performance builds or restoration projects.
Technical Specifications of the Gen III LS1 All-Aluminum V8 Drivetrain
When planning a conversion project or vehicle restoration centered around a 1999 Pontiac Trans Am 5.7L LS1 Engine for a classic car retrofit or an OEM vehicle replacement, tracking precise mechanical factory specifications is critical for managing fuel delivery line pressures and physical firewall clearances.
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Engine Core Construction: Lightweight cast-aluminum cylinder block equipped with high-flowing aluminum cylinder heads (Gen III LS architecture)
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Throttle Control Layout: Reliable mechanical cable-driven throttle body assembly for instant, crisp throttle response
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Transmission Integration: Tremec T-56 6-speed manual transmission featuring a 26-spline input shaft and F-body specific shifter location
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Fueling & Induction: Composite perimeter-bolt intake manifold utilizing standard high-impedance fuel injectors
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Factory Performance Ratings: 305 to 320 Horsepower and 335 to 345 lb-ft of Torque
To cross-reference specific block casting marks, internal oiling routing schematics, or cylinder head airflow charts for high-performance General Motors Gen III sports car engine architectures, you can check out the comprehensive public databases on LSX Magazine and Tech Reference Indexes.
What is Included in This Complete Manual Swap Turn-Key Bundle?
This 1999 Pontiac Trans Am 5.7L LS1 Engine pullout assembly is delivered as an ultra-complete mechanical package, preserving the critical factory electronics and belt-driven components that typical salvage yards slice through or damage during hasty extraction.
Electronics, Loom, & Control Architecture
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Full factory engine wiring harness with all primary injector, coil pack, and sensor clips intact.
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Original matching Engine Control Unit (ECU/PCM) pre-loaded with factory 1999 F-Body manual performance parameters.
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Crucial air tracking hardware, including the factory mass airflow (MAF) sensor housing link.
Mechanical Core Components & Belt Drive Line
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Complete factory composite intake manifold assembly, fuel rails, fuel injectors, and manual cable throttle body.
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Aluminum cylinder heads with complete internal overhead valvetrain, factory camshaft, heavy-duty timing chain, and rugged timing cover.
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Dual individual coil pack sub-assemblies mounted to the original perimeter-bolt valve covers.
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All front belt-driven accessories: high-output alternator, power steering pump, water pump, air conditioning compressor, and starter motor.
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Full internal assembly from the top plenum down to the factory low-profile F-body aluminum structural oil pan.
Why the F-Body LS1 and T-56 Combo is the Gold Standard for Custom Builds
Custom car builders and pro-touring hot-rod shops actively prioritize finding a genuine 1999 Pontiac Trans Am 5.7L LS1 Engine over truck-sourced variants because it yields incredible power density in a remarkably compact, low-profile form factor. Weighing roughly 100 pounds less than a cast-iron counterpart, this all-aluminum block maximizes front-to-rear vehicle weight balance when retrofitted into lightweight imports, classic muscle cars, or sports cars.
Additionally, because the 1999 Pontiac Trans Am 5.7L LS1 Engine in this package is natively mated to a Tremec T-56 manual gearbox, it offers a level of raw mechanical engagement that modern automatic transmissions cannot replicate. The legendary T-56 transmission features a rugged internal design capable of enduring aggressive track use, while its dual overdrive gears allow your vehicle to cruise comfortably at highway speeds at exceptionally low RPM. This F-body platform serves as an ideal baseline for mild performance camshaft upgrades, high-flow cylinder heads, or custom tuning.
Freight Shipping Logistics and Universal Drivetrain Compatibility
This universal 1999 Pontiac Trans Am 5.7L LS1 Engine drivetrain package serves as a direct factory replacement for 1998–2002 Pontiac Trans Am and Chevrolet Camaro Z28/SS models, and stands as an exceptional custom engine swap foundation for vintage muscle cars, pro-touring machines, or custom track cars.
We anchor this entire heavy-duty V8 package onto an industrial wooden shipping pallet, wrapping the aluminum block, intake assembly, and manual transmission in protective industrial shrink-wrap to isolate components from road vibrations during freight transit. All motor oils, transmission fluids, and cooling system residues are completely extracted prior to shipment to fully comply with nationwide highway freight transport protocols. To explore complementary conversion gear or alternative mounting setups, make sure to browse our General LS Engine Swaps Inventory or check out our catalog of Tested Manual Transmissions to match this setup to alternative clutch or flywheel layouts.
Frequently Asked Questions (FAQs)
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Can I use standard 87 pump gas with this F-body engine? While the integrated PCM logic can adjust ignition timing parameters to prevent engine knock, using premium 91+ octane fuel is highly recommended to extract the full factory performance and efficiency from this all-aluminum platform.
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What is required to make this setup standalone for a classic car swap? For vintage vehicle integration, you will need a standalone wiring harness adapter and a professional software reflash to disable the factory VATS (Vehicle Anti-Theft System) security protocol inside the ECU.
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Was the T-56 6-speed transmission fully inspected? Absolutely. This heavy-duty manual transmission underwent complete functional rotation and inspection, confirming smooth manual engagement through all gears, tight shift rails, and clean shaft rotation prior to vehicle teardown.
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Where can I buy a reliable 1999 Pontiac Trans Am 5.7L LS1 Engine package online? Our fully certified, compression-tested engine pullouts provide professional car and truck builders with an honest, completely documented, and dependable performance foundation.
Disclaimer: This pre-owned automotive powertrain package is sold intended for professional vehicle restoration, OEM replacement, or private custom engine swap applications. Professional installation, fresh fluid lines, and complete electronic calibrations are highly recommended to maximize field safety and component durability.
