Exhaust racing tubes without heating function, right for Porsche 911 '63-'77

911 S (2.4) 08/71-07/73
911 S (mech. injection) (2.4) 08/71-07/73
911 S (mech. injection) (2.7) 08/73-08/75
911 T/E/S (not mech.injection) (2.0-2.4) 01/63-07/73
911/911 S/911 Carrera (2.7) 08/73-07/77