Read ( 20 ) Reviews

Progressive Suspension Heavy Duty 422 Series Shocks

J&P Cycles Part Number: 504-843

Manufacturer Part Number: 422-4001C

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Description for Progressive Suspension Heavy Duty 422 Series Shocks

• Steel-bodied, monotube dampers, wrapped with a black powder-coated, progressive-rate steel coil spring

• The dampers feature a nitrogen charge that eliminates cavitation and creates a consistent ride performance with no fading

• The 422 series is a fully adjustable Softail shock, with 2" adjustable ride height and spring pre-load

• The shocks are impressive with a show chrome quality cover that includes 4 ports for coil spring visibility

Product Specs

Product Specs for Progressive Suspension Heavy Duty 422 Series Shocks

Full Covers:
Manufacturer Part Number:
Shock Style:
Gas Filled
Sold in Units:
Standard or Heavy Duty:
Heavy Duty
Warehouse Part Number:
Fitment Questions?

With over 750 years of experience combined, our tech staff has the answers!

Compatible Models

Harley-Davidson® Models

  • Softail Bad Boy FXSTSB : 1995–1997
  • Softail Custom FXSTC : 1986–1999
  • Softail Fat Boy FLSTF : 1990–1999
  • Softail Heritage Classic FLSTC : 1989–1999
  • Softail Heritage FLST : 1989–1990
  • Softail Heritage Springer FLSTS : 1997–1999
  • Softail Night Train FXSTB : 1998–1999
  • Softail Nostalgia FLSTN : 1993–1996
  • Softail Springer FXSTS : 1988–1999
  • Softail Standard FXST : 1986–1990, 1999
Customer Reviews

Customer Reviews for Progressive Suspension Heavy Duty 422 Series Shocks

Overall Rating

5 out of 5 stars (based on 20 reviews)

5 stars (20)

4 stars (0)

3 stars (0)

2 stars (0)

1 star (0)

0 stars (0)

JOHN on 8/13/2019

Super service og hurtigt levering af et godt prudukt 😉👍

RON on 8/6/2019

All I can say is awesome .2 day delivery back riding in 2 days after ordering the shocks looked great thank you for the speedy delivery

NATHAN on 6/20/2019

Done the job no more bottoming out

RETO on 5/13/2019

Everything alright. Thanks!

ARTHUR on 5/5/2019


buckmastaz on 3/1/2019

5 Star

Ramdhani55 on 3/1/2019

5 Star

philam21 on 3/1/2019

5 Star

10mtnvet on 9/6/2018

Really high quality. First Progressive purchase. Installed easy. Set up was simple. Definitely a must for two up riding. JP on time as usual. No complaints.

Mack9857 on 8/26/2018

Very pleased with these. Made a huge difference in my ride. Great investment.

Important Product Notes

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

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