Fuel Prep, "V3 Headboard" Hilux, Extra Cab 1 Step 1 of 3 IMPORTANT: if vehicle is a “ Tub” model (not a cab chassis), also supply the above breather valve from Toyota. J 2 Step 2 of 3 Mount in top Drill the 8.5mm hole in centre, if it doesn't already have one 3 Step 3 of 3 50mm clamp