1964.5 Mustang Engine Information – 170 cubic inch I6 (2.8 L Inline 6)

170 Cubic inch engine was only used on the early 1965 Mustangs, (often referred to as 1964 1/2). The engine code was “U”. Paint color was black (paint code 903)and black heads with orange valve covers (paint code 912) and air cleaner. It was an inline six cylinder single barrel carbureted engine rated at 101 or 105 horse power depending on who you believe. I have also seen sources where it was rated at 105 horses, but I believe most sources show 105.

It had a compression of 9.1:1, a bore and stroke of 3.500×2.940. The exhaust was a single exhaust pipe with a single inlet/outlet transverse mounted muffler behind the axle and in front of the gas tank. The muffler resembles the 8 cylinder muffler, but they are not the same.