Engine - Harmonic Balancers - GM/Fluidamper

From GM Performance - Technical Notes: This damper is neutral balanced; do not use with externally balanced 3.75 inch: stroke crankshafts. Timing pointers are not available for 7.25 inch OD balancers; modify pointer P/N 12341915 to fit this damper. Damper weight is 13.4 pounds.

From GM Performance - This smaller diameter version of the performance proven GM/Fluidamper is ideal for applications which require a lightweight harmonic damper, and for engine compartments with limited space. It has the same advanced engineering features as the 7.25 inch diameter GM/Fluidamper P/N 10051170, including a laser welded sealed housing, a free floating internal inertia ring, and a viscous silicone fluid that is unaffected by heat.

From GM Performance - This 8 inch diameter damper uses a viscous fluid instead of an elastomer ring to control destructive crankshaft vibrations. It is design for all externally balanced big block V8s, including the LS-6 and LS-7. The GM/Fluidamper's inertia ring and viscous fluid are contained inside a hermetically sealed housing. Differences in the rotational speed of the housing and the inertia ring dampen the crankshaft harmonics by shearing the silicone fluid. Technical Note: this damper should be used only with externally balanced crankshafts. use chromed timing pointer P/N 14044821. Damper weight is 17.3 pounds.