Level of restriction that just prevents pumping more air through the pipe beyond a certain point. Very similar to the Cone 2:1 tested below in that regard. They are 50-state EPA compliant and are only marginally louder than the stock mufflers.Īs far as the power goes, it's strong down low, but dies early and levels out above 5000rpm. The slip-ons are stamped with the part numbers 80599-07 (front) and 80503-07 (rear), but the set sells under part number 80503-07. We tested the chrome version, part number 80503-07.
Here's an excerpt from the 2019 SE catalog describing them: These slip-ons are offered by HD in the Screamin Eagle catalog. Test bike: 2007 XL883 Sportster, equipped with stock EFI 1200 heads, flat top 1275 kit, Jackhammer 570 Cams, Air Hammer air cleaner, and tuned with a Dynojet Powervision. Screamin Eagle Street Performance Slip-Ons We'll have you ship it to us, we'll test it, develop a Powervision map that you're welcome to have, and return it to you. All we require is that it can be hung onto a 2007 Sportster, and it also needs to have oxygen If you have a pipe you'd like to see tested, please contact us. The following results are presented in reverse order of how they were tested, i.e. That'll give a much better idea of how the pipe actually performs So anyway, if you want to know how one pipe did against another, look at how each pipe did against the Patriot. Anyway, be aware that some of theĮarly tests were not same-day comparisons however, for those comparisons, there were no differences in the configuration of the bike. Made for a rubber mount (2004-newer), it can also be fairly easily hung on a solid mount (86-03). Great choice because it's one of the best performing pipes on the market (as of this writing it's THE best), and it although it's The pipe we chose to use as the reference is the Patriot Defender. Once we realized this was going to beĪn ongoing process of testing pipes and the bike was simultaneously undergoing changes, we've started taking care when testingĪ pipe to always do a same-day test of a "reference" pipe. Over time, the bike has undergone changes that affect it's output, and furthermore,Ĭhanging weather conditions also affect results, as dyno correction processes aren't perfect. We'll continue to add to this page as we test more pipes so be sure to check back.
As a result, we've compiled a stack of dyno resultsįor some of the more popular exhaust systems, revealing a lot about how they perform, and that information is presented here. Interest grew and soon we had people sending us their pipes for testing. In the winter of 12-13, we tested a few systems for XL's on our shop mule 2007 883/1250 and showed the results on the XL Forum. Arlen Ness F-Bomb - Current King of the Hill Among Available Pipes
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