Did this install yesterday and WAS getting low oil pressure as well as battery indicator. Worked on it until I could not see anymore & continued this morning ( now afternoon ) finally finished around 0100PM. I did not remove the bottom plastic and would notice the car would start up, turn over, shake & die. Operator error pretty much, re-routed some of my couplings...TA DA drove all around the neighborhood with the Spectre blue & silver 4 inch filter. Very noticeable difference in WOT.