Turbosmart’s brand new 40mm external wastegate was designed to fit into tight engine bays while still offering superior flow and heat handling capabilities. The revolutionary new actuator housing is 25% smaller than our current range and allows for easy spring changes and gives the ability to index the cap orientation in 12 different positions.
The most common reason for investing in an external wastegate is fitting an after-market turbo or better control of the boost and consequently the power output of your engine. Additionally, most large frame turbochargers are not equipped with internal wastegate systems. Most tuners will recommend an external wastegate for any engine producing 400hp or more.