Ultra XP Aluminum Fuel Bowl Kit. Fits models 4150, 4160 & 4500. (Will require a .250" longer fuel line). Tumble Polished finish use of o-ring fittings Bowls use standard/traditional floats, float hangers, screws, accelerator diaphragms, etc. Features œClear Pyrex� sight windows on both sides of bowl Fuel œtrough� designed in floor of bowl to route fuel directly to jets & assists to keep jets covered Internal baffling cast into bowl 20% more fuel capacity vs. traditional V-Bowls, eliminates fuel starvation & provides consistent air/fuel ratios Fuel shelf to greatly minimize fuel aeration & promote more consistent metering A threaded drain...