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The WALKER 18201 SoundFX® Exhaust Muffler is designed as a direct-fit premium replacement for a wide range of GM front-wheel-drive sedans and wagons. Made from 100% aluminized steel, this muffler provides superior corrosion resistance and longer lifespan compared to low-carbon steel units.
Engineered with internal partitions, mechanically joined tubes, and spun-locked heads, the 18201 withstands thermal expansion and contraction while minimizing distortion. OE-style louvered tubes help reduce radiated noise, restoring factory-style acoustic performance. An internal drainage system further protects the muffler by reducing moisture buildup.
This muffler installs easily with OE-style routing and pipe connection design, requiring no specialized fabrication or welding. Designed and tested for longevity, the WALKER SoundFX® series ensures reliable, quiet performance and extended service life.
Corrosion-Resistant Aluminized Steel construction
Direct-Fit Bolt-On Installation with OE-style routing
Durable Internal Construction for thermal stability
Factory-Style Sound through louvered acoustic tubes
Internal Drainage System helps reduce moisture and rust
Spun-Locked Heads & OE-Style Welds enhance durability
Engineered for Long Service Life
| Specification | Detail |
|---|---|
| Shape | Oval |
| Finish | Aluminized |
| Body Material | Steel |
| Inlet Type | Pipe Connection |
| Outlet Type | Tip |
| Inlet Inside Diameter | 2.250 in |
| Outlet Outside Diameter | 2.000 in |
| Inlet Location | Offset |
| Inlet Quantity | 1 |
| Outlet Location | Center |
| Outlet Quantity | 1 |
| Body Height | 4.250 in |
| Body Length | 18.000 in |
| Body Width | 9.750 in |
| Overall Length | 29.500 in |
| Inlet Offset | 2.875 in |
| Hanger Included | No |
| Reversible | No |
| Tunable | No |
| Universal or Specific Fit | Specific |
| Grade Type | Premium |
(Direct-fit applications. One muffler required per vehicle.)
2.5L L4 (2474cc / 151 cid) — 1988–1992
2.8L V6 (173 cid) — 1987–1988
3.8L V6 (3800cc / 231 cid) — 1984–1988
3.3L V6 (204 cid) — 1989–1992
2.8L V6 (173 cid) — 1984–1989
2.8L V6 (173 cid, VIN W) — 1986
2.5L L4 (2474cc / 151 cid) — 1988–1989
3.3L V6 (204 cid / 3340cc) — 1989–1992
2.5L L4 (2474cc / 151 cid) — 1988–1992
2.8L V6 (173 cid, VIN W) — 1986
2.8L V6 (173 cid) — 1987–1989
3.3L V6 (3340cc / 204 cid) — 1989–1990
3.8L V6 (3800cc / 231 cid) — 1984–1988
2.5L L4 (2474cc / 151 cid) — 1988–1990
2.8L V6 (173 cid) — 1983–1985
2.5L L4 (2474cc / 151 cid) — 1989–1991
2.5L L4 (2474cc / 151 cid) — FWD — 1988–1990
Direct-fit pipe connection design—no welding required
Inspect hangers, clamps, and hardware for wear and replace if necessary
Ensure proper alignment to prevent vibration and leaks
Walker SoundFX® mufflers are tested for OE-like sound quality and long life
Muffler is non-reversible; install with inlet/outlet in correct orientation
Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.
Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.
Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
