I put the V&H Fuelpac on last month on my 08 Ultra Classic with my stock pipes and SE air cleaner. Easy as anything to install and set up. Bike runs better than ever, much cooler but does have have a little surging issue at very low rpms. Fuel economy looks like it went up a bit. I'm sure there are a number of better ones for those that are looking for real performance but my main concern was to cool down the bike and pipes and save my motor from the summer heat.