New Pro Action™ Small Block Chevy Heads Feature State-of-the-Art Technology & Performance

Delivering “Power By Design” right out of the box 

The new Pro Action™ Small Block Chevy Cylinder Heads by RHS™ utilize advanced airflow and cooling technology to deliver the most “out of the box” power and torque available. The unique RHS™ manufacturing process ensures its products meet strict tolerances and achieve superior final workmanship, something we’ve labeled Clean Cast Technology™, in order to eliminate the need for extensive after-purchase porting. As an added benefit, the refined RHS™ water jacket design flows much better than the competition, delivering improved heat dissipation and yielding more consistent and reliable horsepower for you! 

Pro Action™ 23-Degree SBC Cylinder Heads feature specially designed runners and combustion chambers (available in 50cc, 64cc and 72cc volumes) to maximize volume, atomization and velocity. Improved valve guide material yields tighter tolerances and extended durability. Available in aluminum or iron and straight or angle spark plug configurations, Pro Action™ SBC Cylinder Heads accept 1.550-inch diameter springs and standard style rockers and valve train. For more information about the new RHS™ Pro Action™ Small Block Chevy Heads or any other RHS™ “Power By Design” product, call us at 1-877-776-4323, or visit us online at