The Big Boss Turbo is made with a very robust design to withstand the toughest heat cycle conditions adding reliability with performance and efficiency. The industry-exclusive stainless steel turbine housing design is built to enhance airflow with consistency. A 1.45 A/R ratio keeps the drive pressure within standards to keep the turbo in its efficiency range to improve performance efficiency. This advanced design of the turbo utilizes a V-band style which eliminates the need for the traditional o-ring design of some engines. Like all PDI products, they are designed to make more horsepower and create more efficiency so you save money while making the drive more enjoyable.