C CZLN6 2K+ VIP Jun 6, 2006 #2 Howdy Back: The manifold outlet on all small sixes after '62 is 2". The inner diameter of the head pipe, muffler and tail pipe varied depending on application- from as small as 1 3/4" up to 2". Is that the information you need? Adios, David
Howdy Back: The manifold outlet on all small sixes after '62 is 2". The inner diameter of the head pipe, muffler and tail pipe varied depending on application- from as small as 1 3/4" up to 2". Is that the information you need? Adios, David