Can anyone help me, i just bought 750 cc RC injectors with clips for my RX8 and i want to change em' myself, thanks in advance :).

It's an easy swap, just follow the workshop manual and you'll be fine :)
Check the orings and replace them if you have to, having a leak there is not funny.

where does one check the work shop manual?

Rofl!
Willing to work on a car without having a workshop manual is like taking a girl to see a movie at your home without having condoms! It can be done but it has got its risks :)

where does one check the work shop manual?

You. Must. Be. Kidding.

omfg!

go back to a big store with a huge mazda emblem on top of it, walk to a room labeled "parts department", and tell the man behind the desk that u need a big book to help u fix ur car.

they also had them for sale at sevenstock for $40 last year...

i slapped myself when i saw that price. then facepalmed for buying one from the dealer earlier...

Or go here :) I am in a giving mood today.

http://foxed.ca/rx7manual/2003mazdarx8/

Or, you can just get it for free on my site, where it has always been since 2003.