The PLM Private Label Mfg. B-Series Tri-Y Big Tube Header is the best-selling B-Series header on the market, trusted for over 15 years. Designed with a true step-up exhaust system, this long-tube header delivers significant low- to mid-range power gains, making it ideal for performance enthusiasts. Featuring a two-piece slip-fit design, it ensures a seamless fit for maximum horsepower. For the best value and proven performance, buy the original PLM Big Tube header and unleash big power.