





🔊 Elevate your ride’s sound with precision and peace of mind!
The Walker Quiet-Flow 21856 is a direct-fit exhaust muffler designed specifically for Cadillac DeVille and Calais models from 1968-1976. Featuring 2.5" inlet and outlet connections, it offers OE-style acoustic control with louvered tubes and domed heads to reduce noise while enhancing flow. Built for durability with internal drainage and spun-locked heads, it ensures long-lasting rust resistance and minimal distortion. Easy to install with bolt-on OE-style hangers, it comes backed by a limited lifetime warranty and a 90-day satisfaction guarantee, making it a reliable upgrade for classic Cadillac owners seeking authentic sound and performance.











| Brand | Walker |
| Item dimensions L x W x H | 24.8 x 10.8 x 5.2 inches |
| Vehicle Service Type | Car, Truck |
| Shape | Oval |
| Inlet Connection Size | 2.5 Inches |
| UPC | 086387218566 |
| Manufacturer | Tenneco (Dynomax, Walker, Thrush) |
| Global Trade Identification Number | 00086387218566 |
| Automotive Fit Type | Vehicle Specific Fit |
| Model | Walker Quiet-Flow 21856 Muffler |
| Item Weight | 4.8 pounds |
| Product Dimensions | 24.8 x 10.8 x 5.2 inches |
| Item model number | 21856 |
| Manufacturer Part Number | 21856 |
| Position | Center |
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