These dampers are the dimensional
duplicate of the O.E. damper used on the 2V engine. If used on a 4V
engine, the accessories (alternator, A/C, etc) will rotate 3% slower than
stock. Normally this is not a significant amount. This is due to a slightly
different diameter of the damper. These dampers do not have timing
marks on them but do have a notch in the back rim of the damper
indicating TDC. These two dampers represent the most affordable high
quality dampers available for this increasingly popular engine. See other areas of this site for additional products we offer for the 4.6L 2V engine which includes
a terrific intake manifold, an upper plenum, and several extremely
affordable high performance throttle bodies.