Atomic 550 GT-A | 900HP Rated Built Barra
Price: $14,490.00

Engineered for High Performance
The Atomic 550 GT-A is a purpose-built 900HP-capable Barra engine designed for serious street and track enthusiasts. Offering a perfect balance of power, durability, and refinement, it’s built to handle demanding conditions while maintaining smooth operation.

Key Features & Components

• Ultrasonic Tested Block – Thick-wall Barra block, inspected and matched to support high-power applications.
• Atomic Forged Pistons – Custom 2618 alloy pistons, designed for strength, reduced friction, and quiet operation, rated beyond 1000HP.
• H-Beam Billet Conrods – Unbreakable steel rods with direct oil feed for enhanced cooling and durability.
• Prepped Crankshaft – Chamfered oil holes, linished journals, and an inspected seal track for reliability.
• Performance Cylinder Head – Ported for improved airflow and velocity, featuring upgraded valves, springs, and retainers. Optional cam upgrades available.
• High-Volume Oil Pump – All-steel design ensures consistent lubrication under extreme conditions.
• Precision Assembly – Each engine undergoes meticulous clearancing and assembly, with test runs conducted in-house.

Technical Specs & Benefits

• Power Rating: Up to 900HP, with optional 14mm head studs for 1000HP+ applications.
• Usage: Ideal for street performance, track days, and motorsports.
• Compatibility: Fits SOHC and DOHC Barra engines (BA-FG). (SOHC requires minor modification).
• Durability & Reliability: Engineered for sustained high-performance use with detailed build documentation.
• Shipping: Available Australia Wide

Why Choose the 550 GT-A?
Originally launched in July 2022 to meet demand for an affordable, high-power Barra, this engine delivers V8 Supercar-level performance without the $250,000 price tag. With over 500 Barra engines built since 2004, Atomic follows a strict process, ensuring every engine is thoroughly documented and tested before shipment.

Each build includes:

• ✅ Full measurement records
• ✅ Engine test-run verification
• ✅ Gaskets, merch, and build sheets

Please note: Lead time can be up to 4 weeks. Please ask before purchase.