Everything You Want to Know About the 1996 Corvette, All in One Place.
The 1996 model year would mark the final year of both the C4 and the Generation II small block engine that powered it. As such, Chevrolet was prepared to commemorate its departure by offering two special edition Corvettes, both of which would feature an upgraded version of the LT1 power plant. Denoted as the LT4, the 330-horsepower engine would be showcased in both the Collectors Edition Corvette and a limited edition Grand Sport Corvette.
The LT4 engine featured a number of enhancements over its LT1 counterpart. To start, the LT4 received newly designed aluminum heads that featured taller ports and bigger valves; 2.00-inch intakes and 1.55 inch exhaust. Each of these valves had hollow stems that were specially designed to save weight.
They each received special oval-wire springs that could handle increased lift without binding. To help increase the LT4’s valve lift, Chevrolet employed the Crane Company to provide higher ratio (1.6:1) roller rocker arms.