hey guys, i don't race or anything but i am slowly doing just about everything to my car. so my question is there is a guy on craigslist that is selling an aluminum driveshaft unused for 120.00. will i notice anything different with the car or is it a weight only thing. obviously this is all if its actually new like it says and will fit my car. just wondering if it will rev faster or pull out any quicker or is it dropping weight only......? any suggestions would be appreciated.