Suspension bushings may be replaced with bushings of any materials
(except metal) as long as they fit in the original location.
Offset bushings may be used. In a replacement bushing the
amount of metal relative to the amount of non-metallic material
may not be increased. This does not authorize a change in type
of bushing (for example ball and socket replacing a cylindrical
bushing), or use of a bushing with an angled hole whose direction
differs from that of the original bushing. If the Stock bushing
accommodated multi-axis motion via compliance of the component
material(s), the replacement bushing may not be changed to
accommodate such motion via change in bushing type, for example
to a spherical bearing or similar component involving internal
moving parts. Pins or keys may be used to prevent the rotation
of alternate bushings, but may serve no other purpose than
that of retaining the bushing in the desired position. Differential
mount bushings are not considered