orion25 10+ year member
Junior Member
I don't have a lot of free time to work on my car so...... Which of the big 3 upgrades is the most important? Which is second and which is third? In terms of bang for the buck (time)? System will eventually be a 400w sub amp and a 4x50 or 4x75 amp with plans to grow it in the future. Nissan Altima is the car.