I would say the exhaust first. Start from where the exhaust comes out and work your way up. Kind of like a tube of toothpaste.
Now that is one thing that everyone will agree on.G2Integrity said:As long as you get both eventually it doesn't matter what one you get first.
uhh, we just discussed this...headers make more power...do you need to see pages of dyno graphs to prove this?LX98Civic said:I would get a cat-back first.
More performance and you can see it