The V8-based design of the 195 had no such balance shafts, and costs prohibited adding them.

The 2.5 gained balance shafts and an increase of power.

This is a weight advantage over the I4 engine, which will need a balance shaft.

For the 1992 model year, the 4.3L had its block design modified to allow a balance shaft to be installed.

In 1988, a balance shaft was added to smooth engine vibrations.

Without the 90 bank angle, a balance shaft may be required.

Despite their large capacity, this motor was not equipped with balance shafts.

There is some debate as to how much power the twin balance shafts cost the engine.

The vibration is usually not serious enough to require balance shafts.

Because of this, there is no balance shaft, further lightening the engine.