PROGRESSIVE SUSPENSION 444 Series Shocks — 330 mm (13") rear, Black – 91-17 Dyna, 01-02, 07-10 CVO

The 444 Series Shocks use Frequency Sensing Technology (FST) to detect bump frequency and automatically adjust damping for superior ride quality.

• Deflective disc valving delivers consistent control.
• Pre-load spring adjusts by hand with no special tool required.
• High-pressure gas charge for consistent performance under varied conditions.
• Made in the USA.
• Shocks slightly longer than stock may alter head angle and provide quicker steering; slightly shorter may alter head angle and provide slower steering.
• Before purchasing or attempting installation, confirm wheel travel changes will not cause clearance issues (swingarm/axle to exhaust contact, chain/belt guard, or tire contact).
• Recommended for heavy duty applications when operating near maximum load over 50% of the time.

Watch the overview below for installation notes and real-world testing. 😊