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Progressive Suspension 444 Series Shocks

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Product may vary from photo(s).


J&P Part: 504-513

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Progressive Suspension 444 Series Shocks

• 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

• Frequency Sensing Technology allows the shocks to sense the frequency of a bump and automatically adjust damping for superior ride quality

• These shocks also feature deflective disc valving, hand adjustable spring pre-load (no special tools needed), and progressive rate springs

• High pressure gas charged for consistent performance

• Sold in pairs

• Lifetime Limited Warranty

Made In The USA This product was proudly made in the USA

Product Specs

Adjustable: Yes

Finish: Chrome

Gas Filled: Yes

Length: 12-1/2″

Manufacturer Part Number: 444-4048C

Standard or Heavy Duty: Heavy Duty


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Click (+) to view all compatible models

Harley-Davidson® Models

Dyna Fat Bob CVO FXDFSE : 2009
Dyna Fat Bob CVO FXDFSE2 : 2010
Dyna Fat Bob FXDF : 2008–2014
Dyna Low Rider Convertible FXDS-CONV : 1994–2000
Dyna Low Rider EFI FXDLI : 2004–2006
Dyna Low Rider FXDL : 1993–2005, 2007–2015
Dyna Street Bob EFI FXDBI : 2006
Dyna Street Bob FXDB : 2007–2015
Dyna Street Bob FXDBB : 2015
Dyna Street Bob FXDBP : 2013–2015
Dyna Super Glide 35th Anniversary EFI FXDI35 : 2006
Dyna Super Glide Custom Anniversary FXDC : 2013
Dyna Super Glide Custom EFI FXDCI : 2005–2006
Dyna Super Glide Custom FXDC : 1992, 2005, 2007–2014
Dyna Super Glide CVO FXDSE : 2007
Dyna Super Glide CVO FXDSE2 : 2008
Dyna Super Glide Daytona FXDB-D : 1992
Dyna Super Glide EFI FXDI : 2004–2006
Dyna Super Glide FXD : 1995–2005, 2007–2010
Dyna Super Glide Police FXDP : 2001–2004
Dyna Super Glide Sport EFI FXDXI : 2004–2005
Dyna Super Glide Sport FXDX : 1999–2005
Dyna Super Glide Sturgis FXDB-S : 1991
Dyna Super Glide T-Sport FXDXT : 2001–2003
Dyna Wide Glide CVO FXDWG2 : 2001
Dyna Wide Glide CVO FXDWG3 : 2002
Dyna Wide Glide EFI FXDWGI : 2005–2006
Dyna Wide Glide FXDWG : 1993–2005, 2007–2008, 2010–2015
Low Rider FXS : 1977–1978, 1981–1982
Low Rider FXS-74 : 1979–1980
Low Rider FXS-80 : 1979–1980
Sturgis Belt FXB : 1981
Super Glide Electric Start FXE : 1974–1984
Super Glide Fat Bob FXEF : 1980–1985
Super Glide Fat Bob FXEF 74CI : 1979
Super Glide Fat Bob FXEF 80CI : 1979
Super Glide Kick Start FX : 1973–1978
Wide Glide FXWG : 1980–1986

Important Product Notes

Note: When shocks are shorter than stock, clearance must be carefully checked for potentially dangerous interference.

Note: Standard Duty shocks are for ride loads under 225 lbs., Heavy Duty shocks are for ride loads regularly over 225 lbs.

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