I bought a set of 4, and they ended up being two sets of fronts. Not a huge difference in volume (4.3 sq/in vs 3.9 sq/in).


-'02 Dodge Viper Ex-World Challenge racecar
-'73 Duster, 6.1 based 392 hilborn hemi, tko600, full floater rear 9", Hellwig custom bars, viper brakes, built for road course