GFB ATOMIC Manual Boost Controller - 3001Boasting a repeatable and stable boost curve, quick rise rate, and unbeatable value, GFB's Atomic has earned a reputation as being one of the most reliable and effective manual boost controllers on the market. It is important to note that the Atomic does NOT use a "ball and spring" system like others on the market, for very good reason Most Reliable and Effective on the The Market. REPEATABLE AND STABLE BOOST CURVE 100% RELIABILITY, ZERO MAINTENANCE