I've been reading some automotive forums reagrding this and there are a lot of differences regarding their inputs. I have a couple of questions regarding this and I'm hoping to clear it out.

1. Intake - Do you have to change the whole IM or just add a good air filter?

- I've read some bang-for-a-buck brands to K&N filters. Some of them say the differences are a little bit similar if you go from cheapos to expensive stuff. Also, I've read some things regarding the replacement of the whole intake.

2. Headers - The usual 4-1 vs 4-2-1

- I've seen Mandrel Bent, crush bent and all sorts of stuff. I just can't find a "definitive" description of differences between all of them.

3. Exhaust - Well, mufflers, pipings etc.

- Chambered, Freeflow 2.5" to 3" pipes and the works. So which should you choose? Do you still have to upgrade the full exhaust system or just upgrade pipes and get a good muffler?

These are the questions that I'm trying to answer myself but since I'm still in the noobie stage, I really can't figure it out.

I hope someone could put this in layman's terms so I can understand more.

TIA