363cc   2.300 x 1.880    1.625 Dual Spring

The BRODIX BB-3 XTRA has taken the conventional big block to the next level. These cylinder heads feature a valve angle that is rolled two degrees. The -3 XTRA is available in a rectangular-shaped or oval-shaped intake port configuration. The rectangular port is offered in an out-of-the box version or completely CNC ported. The out-of-the-box version comes standard with CNC ported 119 cc combustion chambers, CNC bowls blended and ports matched, and flow over 390 cfm.