I put the 8 piston on the fronts, didn't have time to finish the rear. Went on a trip and the stock rear rubber line ended up popping off. Did the old cut and crimp off the rear line and 8 hr ride home on the fronts. You couldn't tell there were no back brakes. So I am more than impressed with your product. Since the trip I did a complete hard and upgraded rubber lines plus the 3 piston caliper. Your product is amazing and so worth the time to replace stock brakes. When the next truck comes I will do the same.