After i have installed my aem intake and perrin downpipe......i feel there is a sense of power loss or is it just me. Does anyone know an estimate of how many horses i gain by just added those two on my evo 8. or how many horse power i have loss. i guess someone said i may be running too rich or lean ................here what i have done i reseted my ecu after i installed the aem intake and perrin. ....or could this all be just parinoid . how do u fix it if it's running too rich or too lean? thanks in advance for the advice everyone

 

You need engine management.

 

the hard intake pipe looses performance, u need a fuel managment to correct the af ratios, the hard pipe allows too much air flow and the ECU can't correct itself enough...