Machine : Engine Case oil drain Available in two configurations:

Available in two configurations:

Bosch 74mm throttle body with a bolt pattern compatible with the 1974-94 911 Turbo and 1984-89 Carrera (99mm PCD)

and these newer engines had revised scavenge return lines with a high hump in the middle -- an inverted "P-trap" -- to prevent oil from back-flowing towards the turbochargers

Ceramic thermal barrier or cosmetic ceramic coating available for all turbine housings

Machine : Engine Case oil drain Available in two configurations:TurboKraft performs top motorsport quality machine operations on Porsche engine cases. Machine Operation Services: Inspection, measurement and analysis : $250 Crack testing : from $175 Case cleaning hot tank washing and ultrasonic : from $175 Clean oil passages, replace case plugs : $350 Replace piston oil splash valves (new squirters) : $600 Deck cylinder mating surface and through bolt surfaces : $350 Bore case for larger diameter cylinders : $350