Ordered a Braille 3121 battery for my C7. I want to cut about 100 lbs from the car. The battery at about 20lbs lighter then the stock. Changed to headers 15 lbs lighter then the stock manifolds and carbon air intake 5lbs. In the spring I'm thinking of going with Burns stainless 2 stage mufflers which should reduce the weight another 45 - 50lbs. and sound better. Any other ideas on weight cutting ideas would be appreciated (that aren't too costly)?