Why would they do this?

Why not change 9.1.3.D.2.b.?

just curious... thanks!


From the GCR, 9.1.3.D.1.s-9.1.3.D.2.e.
"s. To allow commonly available engine mount aftermarket
inserts, replacement units, or “window weld” like solutions
without allowing solid metal or rigid materials or bearings that
could result in the driveline becoming a stressed member of
the chassis, the following is permitted. Engine, transmission,
differential or any other driveline mounts may be replaced.
Mounts may use only stock mounting points, must maintain
stock location and orientation of the mounted component, and
must be non-rigid.Rubber or other inserts in stock mounts may
be replaced with any other non-metallic material.
2. Rotary engines (only)
a. Any porting or polishing is prohibited.
b. Rules D.1.a.-k., and D.1.m.-r., also apply.
c. Crankshaft pulley is unrestricted.
d. Alternate rotor seals and springs are permitted.
e. Alternate mounts are permitted as in 9.1.3.D.1.s."