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WALKER - Exhaust Muffler - 18458
WALKER - Exhaust Muffler - 18458
WALKER - Exhaust Muffler - 18458
WALKER - Exhaust Muffler - 18458
WALKER - Exhaust Muffler - 18458
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WALKER - Exhaust Muffler - 18458

WALKER
WAL18458
In stock
Muffler
$97.99 $89.99
Product Description The Walker SoundFX® 18458 direct-fit muffler is engineered for dependable service life, excellent acoustic...
$89.99
WALKER - Exhaust Muffler - 18458
Description

Product Description

The Walker SoundFX® 18458 direct-fit muffler is engineered for dependable service life, excellent acoustic control, and easy installation for select GM 3.8L V6 applications. Constructed from 100% aluminized steel, this muffler resists corrosion and provides increased durability versus standard low-carbon steel. The internal louvered tube design delivers a factory-style sound profile while maintaining smooth exhaust flow.

Built with OE-style routing and connection points, this muffler installs easily without the need for custom fabrication.

Key Features

  • Corrosion-Resistant Aluminized Steel for long-term performance

  • Internal Drainage System reduces moisture buildup

  • Durable Mechanical Joints withstand thermal expansion

  • OE-Style Louvered Tubes ensure factory-correct sound quality

  • Direct-Fit, Bolt-On Design — no welding required

  • Spun-Locked Heads & OE Spot Welds increase stability

  • Engineered & Tested for optimal longevity and fit

Technical Specifications

Specification Value
Shape Oval
Finish Aluminized
Inlet Type Pipe Connection
Outlet Type Pipe Connection
Inlet Inside Diameter 2.250 in
Outlet Inside Diameter 2.000 in
Body Height 5.500 in
Body Length 23.000 in
Body Width 11.000 in
Overall Length 26.500 in
Inlet Location Center
Outlet Location Offset
Inlet Quantity 1
Outlet Quantity 1
Hanger Included No
Body Material Steel
Reversible No
Fitment Specific
Grade Type Premium

Vehicle Compatibility

Buick

  • LeSabre (1994–1999) — 3.8L V6 3800cc/231cid

Oldsmobile

  • 88 (1994–1999) — 3.8L V6 3800cc/231cid

  • LSS (1996–1999) — 3.8L V6 3800cc/231cid

Pontiac

  • Bonneville (1994–1999) — 3.8L V6 3800cc/231cid

Installation & Notes

  • Designed as a direct-fit, bolt-on replacement

  • No welding typically required; uses OE-style pipe alignment

  • Hangers not included — inspect and reuse factory hangers or replace as needed

  • Ensure proper orientation: center inlet and offset outlet

  • Check exhaust system components (clamps, flange, tailpipe) for wear before installation

  • Not reversible — install with outlet offset correctly aligned

  • Recommended to soak old hardware with penetrating oil for easier removal

  • Always verify compatibility with engine size and model year before purchase

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Shipping

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.

Returns

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).

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