Stage 8 has the answer to loose header bolts! Stage 8 locking header bolts are an ingenious design that keeps header bolts from turning out when you don't want them to. A triangle shaped retainer fits over the head of each header bolt. The retainer is made to fit over the hex head. It's similar to a 6 or 12 point wrench on a hex head bolt. The bolt can't turn when the retainer is in the correct position. A C-clip keeps the retainer on the bolt head. Header bolts also have an outer hex head as well as an internal hex head so you can more easily fit them in tight spots against header pipes.