
So long as the gaskets on the cylinder head to which the headers are attached are in good shape and the mufflers are installed nice n' straight, you may not have any problems. Usually, it's caused by a leak in the exhaust somewhere.

It really depends on a variety of factors, and most often - backfiring is associated with how well the entire exhaust system is sealed up.
VANCE AND HINES TWIN SLASH SLIP ONS FOR BREAKOUT INSTALL
If I install these slip on will my bike backfire without a fuel management system? I thought once installed your bike is good to go. If you want to avoid hesitation when you grab a big handful or having the bike stumble at a constant power setting, you will want to make some sort of fueling adjustment along with the installation of this exhaust. While lots of riders want as much power as possible, what's particularly noticeable is the way the engine responds to your throttle hand. You could certainly try running the bike without changing fuel characteristics, but you won't be getting the most out of the exhaust as the OEM ECU can only make up for a limited range of fuel delivery shortcomings.Īn aftermarket fuel management system in the form of a Vance & Hines Fuelpak FP3 will completely mitigate any chance of less-than-optimal power output, and just as critically - throttle response.

Sure, your bike will run after installing the Vance & Hines slip-on mufflers, but it may not operate at peak performance.

