I JUST BOUGHT THE COOL BLUE FILTER. HAS THE SAME MILLION MILE WARRANTY. ALSO SAYS IT HAS INCREASED AIRFLOW FOR MORE HORSEPOWER. THE GUY AT THE PARTS STORE WHERE I GOT IT FROM CALLED ACCEL, THEY SAID IT HAS 50% MORE AIR FLOW AND IS 1 1/2 TIMES BETTER THAN OTHER FILTERS. PERSONALLY I CAN'T EVEN TELL THE DIFFERENCE. BUT WHO AM I TO SAY.