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Carrillos's Pro-Super A beam (Pro-SA) rods are lighter than the traditional H-beam style rod, yet still unbelievably strong. Pro-Super A beam rods bridge the gap between Pro-H and standard Pro-A rods, designed for use in mid to high horsepower and high boost turbocharged and supercharged applications. Pro-Super A beam rods allow for more horsepower and higher RPMs with the advantage of a reduced windage design. Pro-Super A beam rods for the 370Z / G37 ship with standard 3/8th inch WMC cap bolts and are rated to 800whp, they are great for cars that see both street and race driving.