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Would there be any benefit on an autocross car? IE: NO deflection...



If you do not have at least some rubber material for absorbing vibration between the road and the body you will have a lot of vibration. That vibration will probably lead to premature loosening of bolts and higher chassis stresses that may lead to premature component failure.

If it were me I would keep to poly bushings for road racing but in a drag race situation the stresses are greatly decreased because of the length of time the chassis is "worked" is seconds per race not hours.

My