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How we increased power without voiding H-D warranty

Updated: Jun 26, 2023

Who doesn't want to increase their power? It isn't very difficult to do these days but we have to be very careful if we want to keep our Harley-Davidson warranty!


We took our 2019 Road Glide Special into the shop to add more power... increasing horsepower & increasing torque!


We added a 55mm intake manifold before we tuned her on the DynoJet! Combination of Stage 2 & mods are below: Mods done from the start…..

* Mk 4.5 s&s mufflers 1801-1077

* Screamin' eagle torque cam kit #92500074

* Screamin' eagle extreme flow air cleaner #29400357

* Screamin' eagle pro street tuner #41000008c

* Screamin' eagle smart tune pro #41000445


Next step was…

* Screamin’ eagle extreme flow 55mm intake manifold #27300167

* After install we did smart tune pro learn with the dyno bringing the combination together for the end result!!!! *Stock numbers at the rear wheel which coincide with the final dyno sheet which also shows rear wheel measurements

* HP. 105 *TQ 118

* Stock hp 82 * Stock tq 107

Results on stock number may very some depending on bike!

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