The 90915-20004 does not apply to the 01 4runner. It fits F (with spin-on mount) 2F, 3F, 1FZ, 4.0 V6 and 4.7 V8 as well as the Lexus V8's.
It also fits the 22RE.
A nice upgrade. In a pinch I spun one on my 4cyl Camry when I was too lazy to pay you a visit. Talk about over kill.
