After more than a decade of ruling the roads with their famous 440 Series shocks with IAS, Progressive Suspension has unveiled another breakthrough design! It is dubbed Frequency Sensing Technology (FST) for its unique ability to dynamically adjust damping as you ride.
How to Install Rear Shocks on a Harley-Davidson by J&P Cycles
The Indian Larry Twisted Frame Chopper | J&P Custom Motorcycle Builds
150-Horsepower Harley-Davidson | J&P: Custom Motorcycle Builds
124 Cubic Inch Twin Cam FXR | J&P: Custom Motorcycle Builds
The First 8 Things You Should Change When Buying a Harley Davidson