CREATE TABLE table_40167 ("Week" TEXT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Game site" TEXT, "Record" TEXT, "Attendance" FLOAT)

What's the highest attendance for a game the Texan's played at Arrowhead Stadium?
SELECT MAX("Attendance") FROM table_40167 WHERE "Game site" = 'arrowhead stadium'
SELECT MAX("Attendance") FROM "table_40167" WHERE "Game site" = 'arrowhead stadium'