At Shelby, the Cobra Jet replaced the original 428, and GT 500s gained a KR suffix, for King of the Road

The GT500 came equipped with the 428 cubic-inch Police Interceptor engine. In February of 1968, the GT500KR became available and was considered the ultimate Shelby. Under the hood was a 428 cubic-inch Cobra Jet V8 which was rated at 335 horsepower.

The GT 500-KR's 428 had the same suspiciously low 335-bhp rating as other Cobra Jets, though some Shelby material put peak output at higher rpm. Shelby's version had diecast aluminum Cobra rocker covers but wore the same plain painted ram-air air cleaner

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1991 560 SEC AMG, 199k <---- 300 hp 10:1 ECE euro HV ...

1995 E 420, 170k "The Red Plum" (sold)

2015 BMW 535i xdrive awd Stage 1 DINAN, 6k, <----364 hp

1967 Mercury Cougar, 49k

2013 Jaguar XF, 20k <----340 hp Supercharged, All Wheel Drive (sold)