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Free Shipping on orders over $99
Save $10 with code WYLD10 on $100+ orders
Premium motorcycle parts & accessories
Nationwide delivery in 1–3 days
Trusted by thousands of riders across the USA
🔥Spend $100, Save $10 - Use Code:
WYLD10 at Checkout
Free Shipping on orders over $99
Save $10 with code WYLD10 on $100+ orders
Premium motorcycle parts & accessories
Nationwide delivery in 1–3 days
Trusted by thousands of riders across the USA
Free Shipping on orders over $99
Save $10 with code WYLD10 on $100+ orders
Premium motorcycle parts & accessories
Nationwide delivery in 1–3 days
Trusted by thousands of riders across the USA
My Honest Take on the Progressive 422 Shocks for '89-'99 Harley Softails
Let's be completely transparent for a second. If you are still riding around on the stock factory shocks under your 1989 to 1999 Evolution Softail, your back is probably paying the price. Those hidden under-frame OEM units get incredibly tired over the years, bottoming out on almost every highway bump or lane split. Swapping them out for these Progressive Suspension 422 Series Heavy Duty shocks changes the entire dynamic of the bike. Builders and customizers constantly pick this specific kit because it gives you up to two full inches of actual ride height adjustment. You get to slam the rear end of your frame for that low, custom stance without turning your bike into a rigid hardtail that destroys your lower back.When you spend real time and money dialling in your machine—whether you are clean-shaving your handlebars with streamlined upgrades like Kuryakyn Phantom Mirrors or digging deep into your rear chassis setup—you want parts that actually change the way the bike handles. This heavy-duty chrome setup is wound with a much stiffer spring rate than standard progressive kits. It is exactly what you want if you frequently throw a passenger on the back seat, load your saddlebags down with gear for a long weekend run, or just want a bike that stays firmly planted when you push it hard through high-speed sweepers.The actual build quality on these units is rock solid. Progressive uses a high-pressure nitrogen gas charge combined with durable internal seals, which prevents the oil from breaking down and getting sloppy when the shocks heat up on hot summer rides. The chrome finish looks clean tucked away under the frame, and the whole assembly handles rough pavement without fading out. Plus, tweaking the spring preload is simple enough to do right in your garage whenever your total hauling weight changes.Why this setup is worth throwing under your bike
- Total stance control: You get a full two inches of adjustable ride height, so you can choose a low custom drop or stick closer to stock comfort.
- Heavy-duty spring setup: Specifically engineered to handle bigger guys, passengers, or heavy travel gear without bottoming your frame out.
- Nitrogen gas charged: Keeps the internal shock fluid under steady pressure, stopping that annoying rear-end bouncing on bad pavement.
- Durable show chrome: Looks great under the bike while keeping the core shock body safe from dirt, mud, and flying road rocks.
- Threaded collar adjustments: Lets you change your spring stiffness quickly whenever you switch between solo riding and carrying a passenger.
True fitment and part specs
This rear suspension kit only works with the unique under-frame mounting configuration found on first-generation Harley Softail frames. It is a straight bolt-on fitment for 1989 to 1999 models, including the Heritage Classic, Fat Boy, Softail Custom, Night Train, and Springer variations. It is built strictly for the FXST and FLST frame lines running an Evolution powerplant.- Manufacturer: Progressive Suspension
- Part Number: 422-4001C
- Store SKU: pgr422-4001C
- Spring Version: Heavy-Duty (HD)
- Body Finish: Bright Chrome
Softail suspension questions people always ask me
How low can I actually go with these 422 shocks?
You can drop the rear end up to two full inches lower than your stock factory setup. All the adjustments are done via the threaded ends on the shock bodies, so you can dial in the exact custom look you want for your build.What makes the Heavy Duty version different from standard shocks?
The Heavy Duty option uses a much stiffer spring. I always tell guys to grab this version if they weigh over 200 pounds, spend more than half their riding time two-up with a passenger, or travel with heavily loaded saddlebags.Does this kit come with the tools to change the height?
Progressive puts the specific spanner wrench you need to adjust your spring preload right in the box. To change the actual ride height length, though, you will just use your normal garage wrenches while the bike sits safely on a frame jack.Related products
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