macs has a excedllent reputation for replacing any defect, and try weighing a hatori, then a mac, then also try running them back to back you will be suprised...of course the macs arent colored or anodised, one of the things i see so often is guys palcing their pressure taps in the actual header tube in the curve, then complaining that its breaks or strips...... never mind the instructions...[] doh!