How do you define efficiency? The ThunderHeaders (2 into 1) on my Fat Bob added ten more horsepower (no dyno-they advertise it & can feel it!) and the screaming eagle air filter make my Harley a rocket at the flick of a wrist. Of course the ultimate result will depend on the tune. the S&S Power Dual system or the Fuel Moto 2:1:2 X pipe and Jackpot mufflers are good choices.Īs for 2:1 systems, the D&D Fatcat or the Bassani Road Rage II or the Drago system are good options. If you go the 2:1:2 route V&H Power Dual head pipe and your choicc of their slip on mufflers. There is a difference in sound and appearance between the two systems so the choice is very subjective and personal. I think you will be amazed at the difference in performance and much of the heat you are experiencing from the exhaust is coming from the catalytic converter so things should be cooler.Īs for 2:1 vs the 2:1:2 system, your call.
2016 road glide thunderheader slip ons reviews upgrade#
Once the Stage I upgrade has been completed, get the motor tuned. Probably be a good idea to talk to a local dyno tuner (not the one at the dealer) and see what they like to work with. Replace the complete exhaust system including the head pipe to get rid of the catalytic converter, a good fuel management system like the SEPST, Powervision or TTS Mastertune. Your best bet would be to pay the Harley "tax" and do a Stage I upgrade which would include a hi-flow intake and exhaust.
All the later models run leaner than they should to meet EPA regs.
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