Harmonic Balancer - SFI 18-1 SCA9001

Harmonic Balancer - SFI 18-1 A9001 SCA9001 Suit SB Chev 400, External Balance, 6-3/4" O.D SBC 6-3/4" HARMONIC BALANCER These dampers are 6.75" in diameter and approximately 1-1/8" thick. These are believed to be the only affordable dampers available in this size for externally balanced engines such as the 383 and 400 small block Chevy. Like all our Chevy dampers they have 60 ° of timing marks.