Dougster asked:

I have a 2008 HD FLH with a pair of Screaming Eagle slip on mufflers and I just bought the matching Screaming Eagle AC upgrade. Will it be ok if I install this breather kit without flashing the ECM or installing a Fuel Pack? I don't want to hurt my engine. What Do you think? Thanks in advance for any advice you can give.

Our Answer

Dougster....thanks for the question, this is one we get a LOT and unfortunately you won't like the answer. Harley Davidson motorcycles are set up from the factory to run extremely lean and to be honest, they are right on the ragged edge of trouble right from the factory. If you add any modifications that allow the engine to breathe even better, then you are only exacerbating the problem.

The good news is that you don't have to pay the dealer to flash your ECM if you don't want to. My recommendation would be to pick up one of the aftermarket add-on fuelers that you can buy. Several great examples are available including the Dynojet PCIII or the Cobra Fuel Pack as two examples.

These boxes will basically intercept the signals from your O2 sensors and increase the time that your injectors stay open in order to richen the fuel mixture. This will reduce your cylinder temperature dramatically and make your machine run better than ever. Harley's cost money.....everything you do leads to more money.

It's a sickness.