Wellman Glow Plugs 1988-1994 Ford 7.3 7.3L Diesel (set of 8) IDI (indirect injected) 7.3L in F350 F250 Fits 1988-1994 IDI Ford 7.3L Diesel Engines These plugs heat up 20% faster and get 100 deg. hotter than the original plugs OEM Supplier, Made in USA Set of 8