dont think it will lose anywhere like 100 bhp at the wheels it seems pretty impossible to me....like i asked before where does it go?
i made 265 @ the wheels last week with low comp 20 psi t34/55.
it only 2wd so adding about 40 bhp for fly.
4x4 would prob add 50.
saying take off 100bhp for 4x4 is just a tuner trying to rip you off cos your cars not makeing the power....