Atomic - 475 ST | OEM+ SPEC | 600hp Capable

Atomic 475 ST Long Motor – Ford Barra DOHC | OEM+ Spec | 600hp Capable | Blueprinted Street Build

The Atomic 475 ST is our OEM+ long motor for enthusiasts wanting factory reliability with some headroom for up to 600hp. This build is perfect for street-driven Barra-powered Falcons, conversions, or boosted daily drivers who want the confidence of a tough bottom end and properly matched upgrades — without stepping into full race-spec territory.

Blueprint assembled, test-run in-house, and built from trusted Atomic components, the 475 ST gives you peace of mind and plug-and-play performance potential.

✅ Key Features

✅ Quality Block Prep

• Ultrasonically tested seasoned Ford 6-cylinder Barra block
  • Selected for good wall thickness and structural integrity

• Fully machined and blueprint-prepped
  • Torque plate honed bores, decked, cleaned, and painted

✅ Crankshaft & Rotating Assembly

• OEM crankshaft, inspected, polished, and balanced

• Hypatec cast pistons
  • Coated skirts for wear reduction and quiet cold-start operation

• Superleggera rods fitted with ARP 2000 bolts
  
  

✅ Cylinder Head

• Fully reconditioned OEM Barra cylinder head
  • Pressure tested, surfaced, and valve seats 

• OEM valves or optional stainless steel upgrades

• Polished FG cams with Stage 1 or Stage 2 camshaft  upgrade options

• Heavy duty valve springs available as an option

✅ Timing & Valvetrain

• OEM timing gear with upgraded Atomic timing chain and OEM tensioner
  • Optional billet crank sprocket and HD guides

• Cleaned and bled OEM hydraulic lifters optional Atomic Anti Pump Lifters available

✅ Oil System

• Refurbished OEM oil pump
  • Optional upgrade to FULL Steel pump housing

• Sump and pickup reconditioned and resealed

✅ Blueprint Assembly & Testing

• Built in-house to Atomic blueprint spec
  • Bearing clearances, ring gaps, piston-to-wall, and deck heights precisely measured

• Test-run in Atomic’s test rig
  • Includes full report on oil pressure, temp, and compression balance

📦 What’s Included

• Fully assembled Atomic 475 ST Long Motor

• Powder-coated rocker and timing covers (choice of colour)

• Ford oil filter, 15W/40 run-in oil (14L), NGK plugs

• Torque specs sheet, run-in instructions, spare gaskets, Atomic merch

• 12-month conditional street-use warranty

🔧 Optional Upgrades

• FULL Steel oil pump

• Stainless valves + upgraded valve springs

• Adjustable VCT Delete Vernier cam gears

• -10AN welded rocker cover breathers

• High-volume sump or baffled oil pan

• Choice of camshaft stage (Stage 1–3)