motomavens t25 t28 turbo gasket for t2 gt25 gt28 gt2871 gt2860 gt2876 for nissan s13 ca18det s13 s14 240sx 4 bolt turbocharger inlet flange motomavens the t25 or t28 turbo exhaust inlet gasket is a metallic crush style that is one time use only. replace it every time you remove or upgrade your turbo or up-pipe. a leaky up-pipe / turbo gasket can cause a tuner to lose their mind as the boost will not be stable or predictable and will cause the turbo to spool slower thus losing horsepower and torque.