When it comes to buying parts for your car, if there is one simple and inexpensive upgrade that can release a little horsepower in your engine, it is swapping your old stamped-steel rocker arms for rollerized units. PRW Industries has been making rocker arms since 2004, and the company philosophy is to design and build affordable engine parts that deliver what enthusiasts need. We stopped by their booth at the 2015 SEMA Show, and spent some time talking to Shaun Snow to find out about the latest rocker arms it offers, and why people need them.
Snow started by showing us the PQx rocker arms. “These are a very good and cost-effective roller rocker that is CNC-machined from 2024 extrusion aluminum. The trunnion is made of bearing steel, and friction-reducing caged needle bearings support the rocker arm. These rocker arms are capable of working reliably with spring pressures up to around 750 to 800 pounds.”
The PQx rocker arms are designed for use in both street and track applications, and are CNC-machined precision machined to allow the use of larger springs and retainers over other brands. The tip utilizes a heat-treated CR40 steel roller and shaft to ensure minimal wear and long life. It is available in either a standard or super-duty version, and multiple ratios. The super-duty rocker arms feature a wider body that gives better bearing support, and even more strength.
Next up, we noticed they brought along rocker arms made of stainless steel. Although PRW has been making stainless-alloy rocker arms for quite some time, this stainless rocker arm has been upgraded from its previous design by adding material in critical areas, and increasing the trunnion diameter. According to Snow, “The stainless construction and larger trunnion give greater support, and allow for the use of higher spring pressures.”
The rockers are made of premium quality 17-4ph stainless steel, an alloy that is high in nickel and chromium. This material provides high-yield strength that helps resist deflection, and features caged needle bearings.