The Lotus designed, Mercury Marine built LT5 in my 91 ZR-1
Double overhead cam, 32 valves, 16 fuel injectors aluminum block and heads. The LT5 was originally developed with 375 HP, upgraded to 405 HP in 93.
This particular one has been ported and polished, port matched the intake to the heads, headers and full 3 inch exhaust. Chipped and dyno tuned, it puts out 510 HP