I am not too concerned with weight loss as I slow my car down for the classes I run anyhow but : I recently went from a TTI " H " pipe and Flowmaster 40 mufflers that weighed 51 lbs total to an all aluminum system including the mufflers and the whole system weighs 14 lbs for a 37 lb weight savings. Many years ago I swapped from 11 inch drum brakes on the rear that weighed 72 lbs including all the hardware , shoes , drums etc. to a Wilwood disc brake system that weighed 22 lbs for everything for a 50 lb savings.
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