Yea, i'd imagine that the filter is acutally angled down 20 degrees when the engine is in the car, and the from below you can twist it right out. But i have no idea, cause I never personally changed the oil. In any case, This vehicle dyno'd in at 197 wheel horsepower with the cold air intake back when we first got it a year ago. The goal here is to add 100 hp at the flywheel. Can we meet the goal? Only time will tell
(please dont post saying, "you cant do that" , just wait for the results ;-) )