New turbocharger seals for Borg Warner (Schwitzer) S300 S300G S300S S300W S310 S360 S362 S363 S364 & S366 turbos. The turbine seal is a Step Gap seal (also known as Staggered Gap or Stepped Gap Seal). Replaces oem part number 315535. The compressor seal is a standard type seal and replaces oem p/n 186841. Stepped gap seals are designed reduce oil blow by of the Turbine (rear) seal. 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. As a stock seal wears the gap grows bigger, but Step Gap seals retain a gapless seal even after years of heavy use. Greatly reduces the power robbing deposits and residue inside your turbine housing and on your turbine wheel caused by oil leaking past the turbine seal. Provides the ultimate seal. Free shipping within the USA. Shipping cost to Canada is $8.50. Shipping cost to UK, Australia & all other countries is $11.80. Paypal accepted.