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Atomic Stage 4 CNC-ported head• CNC valve job
Description:The Atomic 550 GT-A delivers the ultimate blend of streetable refinement and drag-ready strength
Latest Improvements (2026)
Complete Rotating Assembly & Top End Hardware
but our H13 Tool Steel studs offer superior tensile strength
Atomic Barra Billet Rods | Destroker 'FatRods' NEW Atomic Stage 4 CNC-ported head•Atomic Destroker FatRod Conrods Atomic "Destroker" FatRod Conrods For 3. 5L De Stroker Cranks Optimized Rod Ratio The Geometry of Speed When you are building a dedicated high RPM race engine, the standard Barra geometry becomes a limitation. The Atomic "Destroker" FatRod is designed specifically for our 86mm Stroke (3. 5L) Crankshaft. At 161. 29mm (6. 350") long, this rod significantly improves the rod to stroke ratio compared to the factory setup.
US$ 170.17
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