PUTTING A LARGER INTAKE MANIFOLD ON YOUR CAR WILL LOOSE YOU BOTTOM END AND POLISHED SURFACES WILL REDUCE AIRFLOW!!!, I CAN SEE WHY YOU WOULD THINK THESE THINGS WILL HELP BUT THEY DON'T, YOU ARE WASTING YOUR TIME AND MONEY. AS FAR AS THE WHOLE MIRROR POLISHED INLETS TOPIC GOES, THINK ABOUT A GOLF BALL, WONDER WHY IT HAS DIMPLES ON IT??? ITS BECAUSE THEY MAKE IT TRAVEL THROUGH THE AIR BETTER...SAME GOES FOR SURFACE AERODYNAMICS THE AIR WILL TRAVEL OVER A ROUGH SURFACE BETTER THAN A SMOOTH BECAUSE AIR GETS TRAPPED IN THE ROUGH CREATING A SURFACE OF AIR WHICH OFFERS LESS RESISTANCE. DON'T BELIEVE