Page 110 of High Performance Parts for American V-Twins 2008 by S&S Cycle

exhaust systems slip-on mufflers continued ­ s&s® slip-on performance mufflers what about large displacement street engines we highly recommend the s&s performance mufflers for big inch street engines because of the excellent low and midrange torque they provide midrange torque is generally more important than peak horsepower to the street rider and that s just what the s&s slip-ons deliver dyno chart 2 shows the torque and horsepower of a 2006 dynatm model equipped with an s&s 124 hot set up kit® the lower curve shows the performance with stock mufflers the top curves show both the s&s slash-cut and the tapered performance mufflers and stock exhaust header pipes it is interesting to note that the performance of both s&s mufflers is nearly identical this massive torque starts just off-idle and is just what you need to get up to freeway speed by the end of the on ramp notes it may be necessary to rejet the carburetor or recalibrate the fuel injection system for best performance when a change is made in the exhaust system dyno results are from tests performed on a dynojet® 50 and super flow® 200 dynamometers at the s&s research and development facility in viola wisconsin s&s performance mufflers are designed for closed course competition motorcycles only and do not conform to u.s epa noise emission standards use on motorcycles subject to epa noise regulations constitutes tampering and is a violation of federal law unless it can be shown that use does not cause the motorcycle to exceed applicable federal standards chart 1 chart 1 bottom curves .stock 88 harley-davidson® twin cam 88® engine with stock exhaust middle curves .stock 88 twin cam 88 engine with s&s slip-on mufflers on stock header pipes top curves .stock 88 twin cam 88 engine with s&s slip-on mufflers on stock header pipes s&s super e carburetor and s&s 510 bolt in cams chart 2 this dyno chart shows the difference between stock mufflers and s&s mufflers quite a lot and the difference between s&s slash-cut and s&s tapered mufflers not much please see a word about dyno numbers on page a14 for important information regarding dyno charts presented in this catalog chart 2 4-5 visit us at www.sscycle.com

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