18. Allen Bessant at Bessant Engineering Products in Anaheim, California, handled our dyno testing on his SuperFlow SF-901. Allen is an ex-Pro Stock racer, he has decades of dyno experience, and he’s a friendly guy in general. We highly recommend him for engine building or testing. In hindsight, Bessant would rather have used 1⅞-inch headers for testing instead of these 1¾-inch units, but sometimes you have to work with what is available.