Our new Edelbrock 61189 Victor Jr. cylinder head is designed for high output 650 hp Chrysler 426 - 572 HEMI engines. They feature fully CNC'd combustion chambers and CNC blended seats for optimal air flow performance. This cylinder head also feature a revised exhaust valve angle to accommodate larger intake valves. They also feature brass tubes installed in exhaust pushrod holes to allow maximum clearance with minimal port intrusion.