Wagler Competition Products strives to use the absolute best components in our engines and we do the testing to back it up. We noticed premature O-ring wear in the previous dampers we were using, so we headed to the dyno at S&S Diesel Motorsport for testing. When all was said and done, Fluidampr proved to be the best damper for the 2001+ 6.6 Duramax diesel engine. On top of the numerical data, there was a noticeable reduction in harmonics that could be felt in the concrete floor of the dyno cell. Smooth out your Duramax today!