Most wont know since the axles are subject to inspection and running any good tires will alert the tech inspectors to ask if you have aftermarket axles. Ive heard of 500+passes on nearly stock rears with just axles
I have run the times in my sig with a 100% original rear. Posi, axles, everything. 1.57 60' on a 26" MT DR. Full wieght 3700lb. street car with everything still intact.