^ I was running a 19 phbg too, But I deleted the air box and battery spot on mine because it was all cracked to hell and there was an acid explosion at some point on it. Pretty big improvement over stock, mine always had a little dead spot I couldn’t tune out. Other crossover parts; Intake from a rt bolts right on, but you lose the boost box. It has a 26mm spigot diameter so you can run a tm24 or pwk, the reed block can also work, but requires a spacer.