One of the most common valvetrain upgrades for pushrod-style engines is roller rocker arms, which are often said to increase horsepower through reducing friction. But is it true? You’ll find out on this episode of HOT ROD Engine Masters presented by AMSOIL INC..
David Freiburger l Hot Rod MagazineOne of the most common valvetrain upgrades for pushrod-style engines is roller rocker arms, which are often said to increase horsepower through reducing fric…
