New Stepped Gap performance turbine seal and standard compressor seal for Garrett T2 T25 T28 TB02 TB25 TB28 series turbochargers. These are the piston ring type seals which are on the turbine and compressor ends of the shaft/wheel assembly. When these seals are worn, excessive oil consumption and oil burning will result. Turbine seal replaces oem part number 400749-0006 and compressor seal replaces oem part number 403818-0009. The turbine piston ring type seal is installed on the turbine (hot) side of your turbine shaft. Stepped gap seals are designed to reduce oil blow by of the Turbine (rear) seal and are made to withstand extreme temperatures. The design having a stepped end ensures a gapless seal as the steps overlap reducing possible blow by past the seal and into the turbine housing. Eliminates smoking and oil consumption. Additionally, oil leaking into the turbine housing may result in residue build-up thus hampering turbocharger performance. These parts are often the first to wear out in a turbo. Buyer pays $1.65 shipping within the USA. Worldwide shipping cost is $8.00. Paypal accepted.