ok so i was searching around mantapart.com and was wondering which would gain me more power i know biggers not always better thats why im asking. which would be best to go with the sports big bore TB (56mm) or there 60mm throttle body, and if i did get either would i have to get anything else to coinside with the new tb. also i would gain more power with this as opposed to a 4-1 header?
You should probably avoid mantapart.com because they have been known to take the money and not ship the item out untill a year or two after, if at all. They are haveing some legal problems at the minute as well. As far as a tb or header, I would go with the header first. If you want to get the throttle body, switch for the 2.3 ho tb, its 56mm and is probably a lot cheaper.
Look up SMG they will bore your stock 2.4tb to 56mm for you.

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mantaparts phone doesnt even work now....so looking on their site was probably your first mistake
ok so as far as the header bein a better idea, everyone here has pacesetter or something else..every tech that i work with has told me that getting pacesetters are cheap and wont do me any good. are these worth getting or would something like the weapon r;s be better.
ive had my pacesetter for almost 4 years now. no problems on my end.
you might want to get the ceramic coated pacesetter header

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yeah that would be my only option ..the ceramic coated, so with a nice set up for exhaust its possible you will feel a difference.
more than likely you would

Im a Xbox 360 fanboy...and damn proud of it!!