Engine specs
 

I want to buy a turbo for my 2007 mazda 3 grand touring sport 2.3L, its a 5 speed with 79k miles on it right now i have brand new clutch 2 new motor mounts and new exhaust valves, i currently have an option of buying a turbo kit that its fit to my engine, i only want to boost like 7-9 lbs not so much. I want to know whats the difference between the engine on a standard 2.3 and the mazdaspeed which is also a 2.3??? some one give me advice should i or not?

The Mazdaspeed uses direct fuel injection technology. If you want a turbo kit, we sell a bolt in turbo kit for the 2.3L.

what would i have to change engine wise for me not to have any problems with it?? as in rods, pistons, ect...?

You already have the clutch and motor mounts. You will need a boost gauge, wide band air fuel gauge, colder temp spark plugs.
The turbo kit will come with an AEM FIC fuel timing interceptor and larger injectors.
Most of all it must be be properly installed. Competent professional installation is highly recommended. You will need to run 91 octane minimum gasoline.
Don't up the boost more than it comes and it should be problem free for you.
Rods and pistons are only required if you plan on increasing the boost above past the preset level.