I heard that if you were to install zzps exhaust manifold that you would have to skew the front injectors, is this true?

You can run the power log w/o skewing. The item here is possibly running a little lean for the front bank. Usually 2% is the recommended skew percentage.

Is 2% recommended for the L36 as well?

I believe so, not sure though.

Are you adding other mods to increase flow?

well after a while i will get a high flow cat.

With only a high flow cat and no work to the engine, you probably wouldn't notice any gains or improvements from the power log.

fwiw a highflow cat really doesn't help that much. it'* better then a stock cat performance wise...while i know others on here swear by them but a little research done online you will you are better off deleting it and installing a straight pipe.

so what supporting mods would i need to see gains with the powerlog,i also plan on getting an intense pcm.By the way im on a pretty tight budget.

tight budgets and performance don't go together unfortunately.