The Wilwood 150-40-7416K is a set of four BP-40 pads cut to the #7416 plate outline. The manufacturer lists the pad as #7416 with the BP-40 compound, and it is built for high-temperature racing pads. The manufacturer's tags for this pad include high friction, a high temperature range, wear resistance, and resistance to pad fade and friction loss.
The main reason to pick BP-40 over Wilwood's other 7416-shape pad is the job you need it to do. The manufacturer's BP-Q version targets street performance / racing pads with a medium friction level and a smooth initial response. BP-40 gives up that street manners in exchange for heat tolerance, so it suits a car that runs repeated hard stops on track, where fade is the failure you are paying to avoid. If you mainly drive on the street, the BP-Q is the better match.
Before ordering, confirm your caliper. The manufacturer's fitment list for pad #7416 starts with Billet Narrow Superlite 4 calipers, and the rest of that list needs to be checked against your setup. Search for "7416 BP-40 Narrow Superlite racing pads" or "150-40-7416K track brake pads" to compare fitment, and use a caliper service procedure when you swap the pads. Manufacturer install and bedding guidance for this specific part number was not confirmed in my research, so follow the manufacturer's documentation for your caliper.
According to the manufacturer, BP-40 is listed for high-temperature racing, while BP-Q is a street performance and racing pad with a medium friction level, low wear at low temperatures, and the lowest dust and noise of the two. Choose BP-40 for sustained track heat and BP-Q for daily driving with a performance edge.
The manufacturer's fitment list for pad #7416 begins with Billet Narrow Superlite 4 calipers. Confirm the full list with the manufacturer before ordering, since the complete compatibility information was not visible in my research.
