Fast FT18398 Bump Stop Rear

If you’re shopping for a Fast FT18398 rubber buffer (bump stop), you’re looking at a direct-fit replacement part designed for the rear axle left, rear axle right. This rubber buffer (bump stop) acts as a cushion that limits suspension travel at full compression, preventing metal-to-metal contact and absorbing shock at the end of the stroke. Worn, cracked, or missing suspension boots and buffers are a common cause of premature shock absorber failure, so replacing this part promptly protects the more expensive components around it. Add this Fast bump stop to your cart and keep your suspension protected for the miles ahead.

## Why This Bump Stop Matters

A suspension system is only as good as its smallest parts. The rubber buffer (bump stop) may be inexpensive compared to a full shock absorber or strut, but its job — keeping dirt, moisture, and road debris off the working parts of your suspension — has an outsized effect on how long those bigger, costlier components last. Here’s what this Fast FT18398 brings to the job:

– **Direct-fit replacement** — manufactured to match the fitment of the original component for rear axle left, rear axle right
– **Protects surrounding components** — a bump stop in good condition helps the rest of the suspension assembly around it last longer
– **Straightforward installation** — designed to install using standard hand tools in a typical DIY suspension job
– **Reduces noise and harshness** — a properly fitted bump stop cuts down on clunks and rattles from worn suspension rubber
– **Backed by Fast** — an aftermarket brand supplying suspension and steering components engineered for reliable OE-comparable performance

Whether you’re doing routine preventive maintenance or replacing a part that’s already failed, installing a quality bump stop now is far cheaper than replacing a damaged shock absorber later.

## Specifications & Technical Details

This listing is for **Fast part number FT18398**, categorized by the manufacturer as a rubber buffer (bump stop) for the **Rear Axle Left, Rear Axle Right**. Key specifications as provided by Fast:

| Attribute | Value |
|—|—|
| EAN | 5901797007782 |
| Brand class | Price/Performance |
| Manufacturer | FAST |

EAN: **5901797007782** — use this number, alongside the part number, to cross-check fitment against your vehicle’s existing part before ordering.

Always confirm fitment against your vehicle’s VIN or your current part’s number where possible, since suspension components frequently vary by trim, chassis code, and production date even within the same model.

## Use Cases & Applications

This rubber buffer (bump stop) is most commonly installed during:

– **Shock absorber or strut replacement** — many installers replace the bump stop at the same time as the shock absorber itself, since both wear out on a similar timeline
– **Suspension noise diagnosis** — a torn or missing bump stop is a frequent source of clunking or rattling noises over bumps
– **Preventive maintenance** — replacing a cracked or perished bump stop before it fails protects the shock absorber rod from dirt and moisture ingress
– **Post-inspection repair** — if a routine inspection or state safety check flags a damaged suspension boot or buffer, this part addresses that finding directly

This part is relevant to drivers anywhere in the country — from winter road-salt conditions in the Northeast and Midwest to dusty, high-mileage driving in the Southwest — since contamination protection matters regardless of climate. We ship this bump stop to all 50 states.

## Quality & Sourcing

This part is supplied by **Fast**, an aftermarket brand supplying suspension and steering components engineered for reliable OE-comparable performance. The part number and EAN listed on this page correspond directly to Fast’s own catalog listing for this component, so you can cross-reference specifications directly with the manufacturer if needed.

As with any aftermarket suspension part, we recommend visually inspecting the part on arrival and confirming the part number matches your original component before installation. For more on our sourcing and quality standards, see our [About Us](https://cgautopartsshop.com/about-us/) page.

## Shipping & Delivery

We ship this Fast FT18398 rubber buffer (bump stop) to customers in all 50 US states. Standard delivery typically takes 3-7 business days depending on your location, with faster options available at checkout. See our full [Shipping Policy](https://cgautopartsshop.com/shipping-policy/) for state-by-state delivery estimates and carrier information.

## Buying With Confidence

We list the manufacturer part number and EAN for every suspension component we carry so you can verify fitment before you buy, not after. If you’re unsure whether this bump stop matches your vehicle, our team is available through our [Contact Us](https://cgautopartsshop.com/contact-us/) page before you place an order. Full terms, including our return window for unused parts, are on our [Terms of Service](https://cgautopartsshop.com/terms-of-service/) page, and warranty information is on our [Warranty Policy](https://cgautopartsshop.com/warranty-policy/) page. Reviews for this listing will appear below as customers purchase and install this part.

## Frequently Asked Questions

### Is this Fast FT18398 compatible with my vehicle?

Fitment for suspension components like this one depends on the exact make, model, model year, and sometimes trim or chassis code. We recommend checking your vehicle’s details against the EAN/part number listed on this page, or contacting our team at [Contact Us](https://cgautopartsshop.com/contact-us/) before ordering if you’re not sure.

### Do I need to replace the bump stop in pairs?

Most installers replace suspension boots, dust covers, and buffers on both sides of an axle at the same time, even if only one side has failed, since the opposite side is usually close behind in wear. Whether that applies to your vehicle depends on your specific inspection findings.

### What’s included with this bump stop?

This listing includes the rubber buffer (bump stop) itself as supplied by Fast, part number FT18398. Some kits include additional small components such as retaining clips; check the fitting position and specifications listed above for this specific part.

### How long does shipping take?

Orders ship from our US warehouse network to all 50 states. Typical delivery is 3-7 business days depending on your location; expedited options are available at checkout. Full details are on our [Shipping Policy](https://cgautopartsshop.com/shipping-policy/) page.

### What’s your return policy on suspension parts?

We accept returns on unused, uninstalled parts in original packaging within the window described on our [Terms of Service](https://cgautopartsshop.com/terms-of-service/) page. Because this is a mechanical wear part, we recommend confirming fitment before installation.

### Is Fast a reliable brand for this type of part?

Fast is an aftermarket brand supplying suspension and steering components engineered for reliable OE-comparable performance. As with any aftermarket supplier, we recommend matching the exact part number and EAN to your vehicle’s requirements rather than relying on brand name alone.

### Can I install this myself, or do I need a mechanic?

Replacing a bump stop is a common DIY suspension job for someone comfortable working with jack stands, a spring compressor (where applicable), and basic hand tools. If you’re not confident working under a loaded suspension, we recommend having a qualified technician handle the installation.

### What signs indicate my old bump stop needs replacing?

Common signs include visible cracking, tearing, or perishing of the rubber, a clunking noise over bumps, or dirt/moisture visibly reaching the shock absorber rod. A torn dust cover or boot is often found during a routine suspension inspection.

### Does this part come with a warranty?

Manufacturer warranty terms vary by brand. Please see our [Warranty Policy](https://cgautopartsshop.com/warranty-policy/) page for full details, and keep your order confirmation as proof of purchase.

## Related Products & Resources

Often purchased alongside this part: [Magnum Technology A8A007MT Bump Stop](https://cgautopartsshop.com/product/magnum-technology-a8a007mt-bump-stop/), [Magnum Technology A82004MT Bump Stop](https://cgautopartsshop.com/product/magnum-technology-a82004mt-bump-stop/), [Topran 501 775 Bump Stop](https://cgautopartsshop.com/product/topran-501-775-bump-stop/), [Magnum Technology A8W017MT Bump Stop](https://cgautopartsshop.com/product/magnum-technology-a8w017mt-bump-stop/). Browse the full [Bump Stops & Buffers](https://cgautopartsshop.com/product-category/bump-stops-buffers/) category, or explore [Shop All Parts](https://cgautopartsshop.com/shop/).

For general background reading, see [automobile suspension systems](https://en.wikipedia.org/wiki/Car_suspension) and [NHTSA vehicle safety information](https://www.nhtsa.gov/).