Boyesen Superstock Reed Petals are the most economical way to take care of your stock system’s intake overtime. Boyesen Superstock Carbon reeds are purpose-built to offer superior airflow, and reactivity to throttle inputs while at the same time offering excellent durability for a price that costs less than any stock or aftermarket reed on the market. Superstock Reeds are an amazing blend between economy and performance. With tensions that match OEM specifications, the Superstock Series is the first step to achieving an improved air intake system.