Our two dampers for Pontiacs are dimensionally the same as the 1969 through 1979 O.E. production dampers. In order to fit this damper to a 1961-'68 engine, the use of a 1969 or later timing chain cover, water pump and related accessories are required These parts are available from wrecking yards or Year One at 800-932-7663. Late model timing covers are also being reproduced by aftermarket companies* as well. Unlike some competitive dampers, our models include the tapered machining on the outer inertia ring which allows the use of the stock pulleys. These are both outstanding dampers for the Pontiac engine and are being widely used by Pontiac enthusiasts. Both include 60° of timing marks and engraved marks every 90 degrees.

*See:www.krepower.com
www.tinindianperformance.com

This is an externally balanced damper with a bolt-in counterweight which can be removed for a neutral balanced rotating assembly. This damper will work on 330/350/400/403/425/455 cubic inch Olds engines. The damper features the stock Olds accessory pulley bolt pattern as well as a Big Block Chevy bolt pattern for those who may want to run a crank trigger system. Use of Chevy pulleys will require some machining to damper. Note: On 330 engines, TDC mark must be repositioned. This damper fits late 400 and 425 only. Early 400/425 engines have a different counterbalance than provided. A good balance shop can modify counterbalance to work correctly on early 400 or 425 engines.
Note: Will not fit 350 Chevy Engines used in some years of Oldsmobiles.