By B.J. Vickers While removing the old air cleaner I had to be careful not to tear the rather sticky underlying gasket. Because the Walker plenum’s thinner than the old cleaner, I had to substitute four shorter bolts. The hose clamp that secures the tubular connector to the Walker Airsep unit is top-shelf. That's the vent cap (red) just a few inches from Walker's negative-pressure-inducing vacuum regulator (black). The plug that holds the check-valve fitting slides snugly into the oil-sump-access fitting on the engine's side. An aesthetically pleasing sight! Especially once the smudges are removed from the chrome dome.