If none of this helps, a simple two pull dyno run to check the air fuel maybe needed to see if it's running too lean, if it is, you can use that sheet to e-mail it to Vance and Hines for adjusting.
#THUNDERHEADER SLIP ONS 2017 HARLEY FULL#
Comes complete with full coverage heat shields, 18mm and 12mm O2 sensor ports. Also, do you know when was the last time the fuel filter was changed? With our 2' headpipe, equal length tubes, and a larger collector, this exhaust is made specifically for Harley-Davidson's Milwaukee-Eight engine. Other things to consider, the fuel injectors might be dirty, try adding 1 oz of Lucas fuel system cleaner to you next 4 tanks and see how it does then.
These are the chrome plated stock Harley pipes that ship with a DX.
Not only do its exhausts produce an unmistakable rumble, but they also combine style, power, and performance in one sleek package.
#THUNDERHEADER SLIP ONS 2017 HARLEY UPGRADE#
I have Vance and Hines Black Widow slip-ons now and those are quiet as far as Im concerned. If youre planning an exhaust system upgrade on your Harley, Thunderheader is the brand to give serious consideration to. Packing the baffle correctly will change the torque output.Ī strip of fiberglass mat that can wrap the inside of the baffle twice, then taped to hold works best. Im in the process of putting a thunderheader on an 09. With all that said, I have had bikes with a TH, and my current one wears a Pro pipe BP. Both in stock form will get the job done, but the 2001 was a far stronger set-up, and some builders I have talked with feel they ran stronger and the flywheels would not side load and wobble. Shop the best selection of Thunderheader Harley-Davidson Mufflers/Slip-ons at Dennis Kirk for the lowest prices. The 2001 and the 2004 have different motors, the 2001 being the three main bearing Timkin design, the 2004 being a two large roller bearing unit. I will ASSUME this and base my answers for this.įirs off, no two Harley's are the same, I have ridden ones that you could feel it pull harder then the one right next to it, both being the same year and model. Then you bought A 2004 FI bike and put a Pro pipe on it, and you are feeling there is less power then your old bike. It is important to know that the exhaust exits as long columns or pulses of spent gases, and at peak RPM, the pluses can reach velocities of about 300-350 feet/second, and a frequency of about 3,000 per minute. If I read this correctly, you had a 2001 carburated bike with the TH, and it was lost in the crash. Before you can understand how the Thunderheader works, you should have some insight on the dynamics of exhaust pulsing.
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