What really works when it comes to aftermarket performance parts — and what’s just noise, shine, and marketing hype? In this episode of https://Drive-Radio.com: The Extra Mile, host John Rush pulls back the curtain on the good, the bad, and the ugly of performance upgrades, joined by engineer and producer Luke Cashman. From cold air intakes to exhaust systems, programmers, gears, and suspension, John draws on three decades of hands-on experience in off-road shops and racing to ask the questions every enthusiast should: Are your mods actually adding horsepower… or quietly making your vehicle worse? Are you gaining performance