Hey guys i am wondering how much of a gain i could expect to have over the mods i have in my sig by getting a good set of heads like mph's stg 2.5s? I figure after my current round of mods i will be sitting somewhere around 260-270rwhp. I am kicking this around but don't know if i want to spend 2k on a set of heads. Thanks for any input.
. just alot of $$$.
That is great.