Most factory balancers are only marked to about 12 degrees, which is useless once you need to check total timing at 3,000 rpm. These adhesive tapes wrap the balancer and give you a readable scale from 14 degrees after top dead center out to 64 degrees before, in one degree steps, so total advance can actually be verified with a timing light instead of estimated.

MSD 8985 Harmonic Balancer Timing Tape Set Features:

• Set of eight tapes in multiple sizes.
• Covers harmonic balancers from 5.25 in. to 8.00 in. in diameter.
• Marked in 1 degree increments from 14 degrees ATDC to 64 degrees BTDC.
• Works on factory and aftermarket balancers.