I put this in my car 2 years ago and it works great, It is aluminum with a copper coating. They used to sale the 2 gauge red in a 20 ft roll now it's only in a 100 ft, So just buy black and use red heat shrink on the positive side.

My car lost 6.5 lbs.

http://www.jegs.com/i/Accel/110/1849/10002/-1?parentProductId=