Broilmaster P4-XFN Premium Natural Gas Grill On Black In-Ground Post. P4-XFN + BL48-G. Post & Patio Mount Gas Grills. The Broilmaster P4 Premium gas grills feature the legendary 40,000 BTU stainless steel Bowtie Burner for excellent heat distribution, as well as a heavy-duty cast aluminum construction, making it the last grill you will ever need. This Broilmaster grill also features a spacious 473 square inches of total cooking area. The 2 piece, multi-level, solid stainless steel rod cooking grid introduces possibilities for a variety of cooking styles. The Flare Buster Ceramic Flavor Enhancers evenly distribute heat and vaporize drippings to add that delicious smoked flavor to your food. This grill comes with heavy-duty black painted steel in-ground post for permanent installation.