Current setup: HPE 819, Boyesen intake with 46mm SBNs and 1 1/2" Hot Products cone style flame arrestors (they fit inside the Phantom hood). In order to get the motor to run better, I've had to increase pop-off to 38psi (1.8 N&S, 95 gram spring). Oh... and 105 low and 120 high jets. Ski rips...