GPR all the way. We use one on our Class 40 Baja racer (WR 426 with all the goodies). We have over 2000 hard race miles, with no problems. GPR is a great company with great helpful folks. The product is made in the US, which for me is a plus. I could have got a Scott's free from the manufacture (Ohlins), but instead we paid for a GPR.