1999 is what your looking for.
FYI the 96 cu engine has been around for a long time, but only used or offered on Police motorcycles up till 2007.
The Harley-Davidson Twin Cam 88 engine was released for the 1999 model year in September of 1998. The Harley-Davidson Twin Cam 96 was released for the 2007 model year. Although these engines were the successors to the Evolution engine ("Evo"), they share a number of characteristics with nearly all previous Harley-Davidson engines. They have two cylinders in a V-twin configuration at 45 degrees. They’re air cooled. They control valve timing with push-rods. The crankshafts have a single pin with a tongue and fork arrangement for the connection rods. These are sandwiched between a pair of flywheels
Agree with 1st answer, except the ‘Softail’ models still had an Evo in 1999. Then, in 2000 they got a Twincam 88B (balanced.)
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