Heat exchangers set for 3.6L conversion (only for 2 in. muffler)

These heat exchangers are required when installing a 3.6L 964 engine in a 911 from 74-89._x000B__x000B_Installing a 3.6L engine into a 911 from 1974-1989 require an updated exhaust system._x000B__x000B_These heat exchangers are designed to achieve optimal performance in conjunction with a dual inlet muffler._x000B__x000B_Fits: 3.2 (84-89), SC 3.0 (78-83), 3.0 Carrera (76-77), RSR 3.0L (74-74), RS 3.0L (74-74), RS 2.7 (74-76), 911 2.7 (74-77)