While it wont be a big difference, it will be a difference. My mods are in my sig, If I punch it at 35-40mph I can spin-em like crazy (BFG KD on my car), my car didnt use to do that, not when it was stock. but then again I dont feel like I am driving a Nascar either, I believe you will feel that its a bit stronger but nothing too serious as like going strait into heads and cam or nothing but should feel a difference especially up top. Mine pulls noticeably harder when I punch it at like 55-60mph after headers. Mine still isnt tuned yet, I am planning on doing heads, cam and stall in spring so I am waiting to tune mine.