Thier top notch and stand behind thier work. Last August at Pontiac Nat's my buddy bent a valve on his 8 sec FB. Not thier fault. He floated the valves with 22 lb's boast. Few more then thier rated. They overnighted the valves to us at the track! We had it ready for Sunday. Then he sheared the ring-n-pinion on the 2nd pass.