HI MIKE YOUR QUESTION IS TWO ANSWERS YES AND NO A STOCK DAMPENER WILL LAST ABOUT 100000 MILES THE RUBBER IN THE DAMPENER WEARS, OR BREAKS DOWN OVER THE MILES. SOMETHINGS THEY FALL APART, AND SOMETIMES THEY TWIST AND THE TIMING MARK DOESN'T STAY TRUE. IF YOU SPIN YOUR MOTOR TO 6000 RPM ONCE IN A GREAT WHILE YOU WILL NOT HAVE ANY PROBLEM IF THE DAMPENER IS IN GOOD SHAPE. A BROKEN DAMPENER CAN DO ALOT OF DAMAGE BOTH THE ENGINE AND TO THE CAR ITSELF. I SAW A STOCK DAMP. GO THOUGH A STEEL FENDER AT RACEWAY PARK, DRAG RACING AND PUT A HOLE IN THE CONCRETE WALL, IT WOULD HAVE KILLED SOMEONE IF NOT FOR THE WALL. THE REAL GOOD DAMPENERS ARE REBUILDABLE AND SFI. APPROVED AND ARE DESIGNED FOR HARD ABUSE. THE QUESTION YOU NEED TO ASK YOURSELF IS YOUR MOTOR GOING TO SPIN AT 6000RPM, THE PRICE OF YOUR MOTOR IF IT IS BROKEN BY A CHEAP DAMPENER TO REPAIR, AND THE SAFETY OF YOURSELF AND YOUR PASSENGER GOOD LUCK WITH YOUR CHOICE
RICK LAKE