I have an 08 ls sedan, automatic. With intake, shorty headers, catless dp, cat back exaust, and a tune what sort of power would I make at the wheels? Also what are some realistic 0-60 and 1/4mile times?
you didnt indicate what type/brand of each mod you had, but I would be hard pressed to believe youd see more than 145 at the wheels. 170whp on an auto car would mean youd be around 200 crank hp which is just not happening with stock intake manifold and shorty header.
The reason I'm hesitant to upgrade to a long tube header, intake manifold, and throttle body is I don't want all my power to be up high in the rpm band.
fully bolted and tuned i was quicker than stock, but still not fast enough for me. now im supercharged and incredibly happy
but bolted and tuned is a good place to start, it made a good difference (im auto as well)