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