Crower 74400X212F Features:

Crower 74400X212F exhaust shaft rocker mounting stand for one-piece big block setups with Dart Big M aluminum cylinder heads 5/8 in. exhaust stand engineered for correct shaft rocker geometry on high-performance big block Chevrolet valvetrains Permanent ID stamp 212F on the mounting base stand helps verify correct application and reduce installation errors Replacement base stand built for extreme racing environments to support exhaust-side valvetrain stability under high RPM use

Exhaust Stand 5/8 For On One-piece Bb, Dart Big Features:

• 5/8 in. exhaust shaft rocker mounting stand for one-piece big block Dart Big M aluminum cylinder heads and precise exhaust-side alignment
• Stamped 212F ID for fast part verification, installation accuracy, and reduced stand mix-ups in Dart Big M valvetrain service
• Replacement base stand that maintains correct exhaust rocker geometry on high-performance big block builds under demanding use
• Valvetrain stability support for extreme-racing and high-rpm exhaust-side rocker systems in one-piece shaft-mount applications
• Application-specific fit for one-piece BB stand setups requiring a dedicated exhaust-side mounting stand on Dart Big M head combinations