FREE JUNKYARD HORSEPOWER EXHAUST UPGRADE360 MAGNUM. HOW CAN YOU ADD POWER TO YOUR DODGE 360 MAGNUM FOR NOTHING? CHECK OUT THIS VIDEO ON CHOOSING THE RIGHT EXHAUST MANIFOLDS WHEN YOU SOURCE A JUNKYARD 360 MAGNUM. ALSO FIND OUT HOW WELL THE DIFFERENT MANIFOLDS COMPARE TO AFTER MARKET LONGTUBE HEADERS, AND HOW THE EXHAUST CHANGES ALTER THE AIR/FUEL MIXTURE SUPPLIED BY THE CARBURETOR. ALL TESTS WERE RUN ON THE MOPAR PERFORMANCE 360 CRATE MOTOR. WHAT COULD BE BETTER THAN FREE HP?