FULL DYNO RESULTS. HOW TO MAKE 427 CHEVY POWER. HOW MUCH POWER DOES A 427 CHEVY MAKE? HOW RESTRICTIVE ARE THE FACTORY EXHAUST MANIFOLDS? HOW MUCH ARE LONG TUBE HEADERS WORTH ON A 450-HP 427? HOW CAN I BUILD A BETTER 427 CHEVY DRIVER COMBO? CAN I HAVE THE POWER OF A 425-HP L72 THAT DRIVES LIKE A MILD L36 390-HP VERSION. HOW TO MAKE 600 HORSPOWER WITH YOUR 427. ADD THE RIGHT COMBINATION OF AFR CYLINDER HEADS, A HEALTHY CAM AND SINGLE-PLANE INTAKE AND YOU CAN REACH 600 HP. CHECK OUT THIS VIDEO WHERE THE STOCK CORVETTE EXHAUST MANIFOLDS WERE CCOMPARED TO LONG TUBE HEADERS ON A 450-HP (DRIVER) 427 BUILD. NEED EVEN MORE POWER? CHECK OUT THE 600-HP, AFR-HEADED 427 BUILD UP1