How Much Power Can An Intake And A Exhaus Produce?

[crazylexus]

i had just installed an injen intake system and a greddy exhaust system on my 1993 sc300 and i will like to know how much power does it give to the wheel. Thanks

[91CRXsiR]

intake can add anywhere from 5-15 HP depending on the motor and motor condition and exhaust around another 2-4 depending on how much back pressure is left.

when I installed my exhaust I lost low end torque but picked up on highend HP. good for that extra kick on the freeway.