The 1965-1967 Corvette 6500 RPM Tachometer Redline Gauge limit was based upon the amount of horsepower the Corvette produced. The 6500 Redline was set for all 327 cubic inch 365 and 375 horsepower Corvettes for 1965-1966, 1965 396 425 horsepower and the 1966-1967 427 425, 430 & 435 horsepower cars.
Applies to all manual and automatic transmissions.
Applications 1965:
Applications 1966:
Applications 1967: