five stars is it normal that at 2000 revolutions and at a constant aceleration and when i let the accelerator loose it makes like an aire e increased my mileage by 2 mpg kn air filter for the toyota prado 30l tdiesel 2012 spectre 9 air filter kit spectre 4770 does not come with wingnut it came without a stud or wing nut ok car owner youre looking at it just get it kn air filter for ford explorer kn quality 2003 lincoln aviator mileage increase nice alternative to the bulky name brand 300 dollar air air cleaner used it on my 2006 vulcan 1600 with a pc3 and a full exhaust added 15 ponies average hp gain looks good