Rated 4.5 out of 5 by 12
Rated 5 out of 5 by DENNISnALABAMA Stage IV in 2012 FLHTK
After test riding a new Milwaukee 8 bike, the only thing wrong with my FLHTK 2012 bike was I rode the new, very high torque Milwaukee 8. After having the 103 Stage IV kit installed and Dyno tuned using a Screamin Eagle Performance Tuner, I got 107.4 HP max and 110 ft-lbs Torque. I have Vance & Hines Power Duals with Monster Oval pipes and a Screamin Eagle 58mm Air box. The bike now feels great, power is always there to be tapped into in all gears and at all speeds. I am very pleased. Can't wait to ride the Dragon again. Thank you Redstone Harley Davidson!
September 23, 2016
Rated 5 out of 5 by RickC Bitchin'
117 hp 119 tq with Supertuner. Substituted S&S roller rockers and lifters. H-D Arthur St. in Louisville KY did a great job with wrenchin' and tuning. The main trouble I have is gettin' the silly grin off my face!
August 10, 2016
Rated 1 out of 5 by Ironjay1000 Very disappointing
Motor barely runs better than stock and at some RPMs the stock motor made more power. The dealer cannot tune it correctly and I don't even like to ride the bike anymore. I have a stage 4 in a different bike and love it but this motor is tuned so poorly it is sickening. I keep getting the runaround at the dealer when I ask them to fix it. They say they tuned it correctly and then later say their dyno needs repair. I could have got a much better product with aftermarket parts and the motor company let me down this time. I stand up for the Harley motor packages and my friends told me I was a fool. Now I think they may have been right. Wish I never touched the motor and could not be more disappointed.
August 5, 2016
Rated 5 out of 5 by Ponser Stage IV Kit a Great Enhancement to the Rushmore Engine
Had the Stage IV kit installed during a Biker Build Off event at my dealership. This is a must for the enthusiast that insist on more power with the confidence that the components can be trusted by HD. The Screamin Eagle kit is engineered to work with the 103 engine and bring out the very best the Rushmore has to offer. The Rushmore engine is already an engineering marvel and the enhancement of a Stage IV kit just pushes the envelope to a very manageable and rideable machine. Recommend the dealership installs and have a before and after tuning. Make sure to do a 1000 mile breakend fluid change. I've had my Stage IV for a year without any issues. Check out my Tuning Before and After...documented 116 HP and 116 torque. You will love this Kit!!
December 28, 2015