Atomic Barra Premium Billet Main Cap Set

NEW - Atomic 4140 Billet Steel Maincaps

Made out of a high grade 4140 which is preferred for Barra main caps. Costs more but it's ~45% stronger and not too hard. This is important as if the caps are harder than the block is becomes very difficult to get a good roundness and finish on the tunnel. The hardness also makes the caps brittle which is not ideal for that sort of part

Fixed the offset tunnel found on other options which makes machining harder and cost more

Fixed the depth and width of the bearing tang groove so that bearings aren't being pinched and distorted or twisted

Made by a repetition style machinist with custom fixturing to ensure great dimensionality and consistency

Clearly marked with a window to engrave the blank caps once assigned