Drive Radio

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 — or just sound and looks? At a mile-high elevation, do the same rules even apply? John explains why altitude changes everything, how misleading dyno tests can fool buyers, and why some “cold air” intakes actually rob power instead of making it. He challenges the myth that louder means faster and reveals why a well-designed single exhaust can outperform dual setups. Thinking about a tu