Engineered for the Streets: Polyurethane End Links That Hold Up Where Rubber Quits
The Prothane PRO19-409-BL Universal End Link Set is built for drivers who demand lasting suspension performance without the slop that factory rubber bushings develop over time. Featuring a 4.5-inch mounting length straight bolt design, this universal kit replaces worn or failure-prone OEM end links with high-durometer polyurethane that resists compression set, oil contamination, and UV degradation. This end link set is a complete hardware kit, delivering tighter handling response and more predictable cornering feel compared to soft OEM bushings.
Key Features
- Polyurethane bushings resist oil, ozone, and UV far better than OEM rubber
- 4.5-inch (114.3mm) mounting length fits a wide range of sway bar and end link applications
- Straight bolt style for simple installation without specialized tools
- Complete kit includes all hardware needed for a full end link replacement
- Black finish for a clean under-car appearance
- Backed by Prothane’s Lifetime Warranty
- Firmer bushing material reduces deflection for more consistent suspension geometry
- Universal fitment makes this end link set adaptable to custom or modified suspension setups
Specifications
| Detail | Value |
|---|---|
| Part Number | PRO19-409-BL |
| Brand | Prothane |
| Mounting Length | 4.5 inches (114.3mm) |
| Bolt Style | Straight |
| Bolt Size | 3/8-16 x 7.5 inch hex cap bolt |
| Bushing Material | Polyurethane |
| Bushing Dimensions | 3/4 x 1.150 OD x 3/8 ID inch |
| Metal Sleeve Dimensions | 9/16 x 0.083 x 2.750 inch |
| Color | Black |
| Fitment Type | Universal |
| UPC | N/A |
| Warranty | Prothane Lifetime Warranty |
What’s Included
- 2x Hex cap bolts (3/8-16 x 7.5 inch)
- 8x Polyurethane bushings (3/4 x 1.150 OD x 3/8 ID inch)
- 2x Metal sleeves (9/16 x 0.083 x 2.750 inch)
- 8x Washers
- 2x Lock nuts
Frequently Asked Questions
What is the mounting length of this end link set?
The PRO19-409-BL has a 4.5-inch (114.3mm) mounting length, which is the distance between the center of the upper and lower bolt holes in the installed position.
Is this end link set a direct replacement for OEM end links?
This end link set is a universal kit. It is not a direct drop-in for a specific vehicle. It is designed to replace or upgrade sway bar end links on vehicles where a 4.5-inch mounting length and straight bolt style are appropriate. Always verify your vehicle’s existing end link dimensions before ordering.
Why choose polyurethane bushings over factory rubber end link bushings?
Polyurethane is significantly harder than standard rubber, which means less deflection under cornering loads. This translates to more consistent suspension geometry, sharper handling response, and longer service life. Polyurethane also resists oil, ozone, and UV degradation that commonly causes rubber bushings to crack and fail.
What bolt size does this end link set include?
The kit includes two 3/8-16 x 7.5-inch hex cap bolts, along with matching lock nuts and washers for secure installation.
Does this end link set require any special tools to install?
No specialized tools are required. Basic hand tools including a socket set and torque wrench are sufficient for installation. The straight bolt style simplifies the process compared to ball-joint or pillow-ball end link designs.
How do I know if the 4.5-inch mounting length is right for my vehicle?
Measure your existing end links from the center of the upper mounting hole to the center of the lower mounting hole with the suspension at ride height. If that measurement is approximately 4.5 inches, this kit is likely a good fit. Consult a suspension specialist if you are unsure.
Are the bushings greaseable?
Prothane polyurethane bushings are engineered to work dry or with a small application of compatible grease. Applying a thin coat of white lithium grease or Prothane’s own Slick Grease to the bushing surfaces during installation reduces noise and extends bushing life.
What warranty does Prothane offer on this end link set?
Prothane backs this end link set with their Lifetime Warranty against manufacturing defects, which is one of the most comprehensive warranties available in the aftermarket suspension category.
Can this end link set be used on a vehicle with a custom or modified suspension setup?
Yes. Because this is a universal kit, it works well in custom builds, lowered vehicles, or applications where the factory end link length does not match modified suspension geometry. Verify the 4.5-inch mounting length suits your application before installing.
Installation Instructions
- Safely lift and support the vehicle on jack stands. Do not work under a vehicle supported only by a floor jack.
- Locate the existing sway bar end links and remove the upper and lower mounting bolts. Note the orientation and position of existing hardware before disassembly.
- Remove the old end link assembly and inspect the sway bar and control arm mounting points for wear or damage.
- Apply a thin coat of compatible grease (white lithium or Prothane Slick Grease) to the outer surface of each polyurethane bushing.
- Slide the metal sleeves into the center of the polyurethane bushings.
- Assemble the end link: place a washer on the hex cap bolt, insert through the upper mounting point, thread the bushing and sleeve assembly onto the bolt, add another washer, and then repeat on the lower mounting point.
- Hand thread the lock nut onto the bolt end. Do not fully tighten with the suspension hanging freely.
- Lower the vehicle to ride height, then torque both bolts to specification with the suspension at full weight. Refer to your vehicle’s service manual for proper torque values.
- Repeat for the opposite side. Inspect for binding or interference throughout the full suspension travel before returning the vehicle to service.
WARNING: This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.
