Why You Need a Main Girdle

As Barra builds push beyond 400kW at the tyres, the stock bottom-end starts to show its limits. Under high RPM and load, the main caps begin to "walk" or chatter on the block surface. This movement throws off crankshaft alignment, accelerates bearing wear, and can lead to catastrophic main bearing failure. Whilst you might see big power Barras with SBEs stock bottom ends putting out big numbers with minimal mods, it isn't a recipe for a long lasting, trouble free car. 

The Atomic Solution

The Atomic Billet Main Cap Girdle acts as a rigid exoskeleton for your bottom end. By tying all 7 main caps together, it dampens harmonic vibrations and prevents individual cap movement. Laser-cut from high-tensile steel and surface-ground for flatness, it is the most effective way to stabilize your rotating assembly without moving to a full billet block.