15% OFF ORDERS $35+ | 20% OFF $100+ | ONLINE ONLY
USE CODE
FRESHCAR
*
Exclusions apply.
Advance Auto Parts Logo
Choose a Store
  • Shop All
  • Replacement Parts
  • Performance Parts
  • Accessories
  • Oil & Fluids
  • Special Offers
  • Advance Rewards
  • Advice & How-Tos
  • Project Guides
  • FAQ / Help Desk
Loading...
Share
Product thumb
Product thumb
Product thumb
Product thumb
Product thumb
Product thumb
Product thumb
Product thumb
Product main large
Loading...
How Would You Like To Get This Item?

Store Pickup

Loading...Loading...Loading...

Same Day Home Delivery

Loading...Loading...Loading...

Home Delivery

Loading...Loading...Loading...
Loading...
Loading...
Loading...Loading...Loading...Loading...Loading...

Product Information

Product Details
Part No. 17661
Warranty Details (1 YR REPLACEMENT IF DEFECTIVE)
Product Features:
  • AGGRESSIVE SOUND - Two-chamber design for deep, aggressive tone
  • ENGINEERED TO LAST - 100% welded aluminized-steel construction reduces corrosion
  • SLEEK FINISH - Painted silver finish with embossed Thrush logo for improved appearance
  • FLEXIBLE SOLUTION - Customizable design offered in a variety of styles and sizes for universal fitment (may require specialized fabrication and/or welding)
  • SPECS - Available in 4-in. x 9.5-in. oval body and a variety of overall lengths; 2.25-in., 2.5-in. and 3-in. inlet/outlet sizes; see product specifications for more information
  • SUPERIOR PERFORMANCE - Chambered design with directional, non-reversible flow while flow director technology channels exhaust flow
  • BUY WITH CONFIDENCE - Comes with Thrush's 90-day limited warranty
Specifications
Body Height:
4.000 in

Body Length:
13.000 in

Body Material:
Steel

Body Width:
9.500 in

Finish:
Painted

Grade Type:
Performance

Inlet Configuration:
Centered

Inlet Inside Diameter:
3.000 in

Inlet Location:
Center

Inlet Quantity:
1

Inlet Type:
Pipe Connection

Internal Construction:
Reflection

Muffler Type:
Reflection

Outlet Configuration:
Offset

Outlet Inside Diameter:
2.500 in

Outlet Location:
Offset

Outlet Quantity:
2

Outlet Type:
Offset

Overall Length:
19.000 in

Part Description:
Muffler

Reversible:
No

Shape:
Oval

Shell Diameter Height:
4.000 in

Shell Diameter Width:
9.500 in

Shell Shape:
Oval

Tunable:
No

Universal Or Specific Fit:
Universal
Loading...
Loading...Loading...Loading...Loading...Loading...
Loading...
Loading...
Loading...Loading...Loading...Loading...Loading...
No results
Loading...
Loading...Loading...Loading...Loading...Loading...
Feedback
Be The First To Know About Deals And Promotions.
Plus, create an account to receive $5 off of $20 or more.
TOP REPLACEMENT PARTS
Brake Pads & Shoes
Brake Rotors
Alternators
Water Pumps
Starters
Brake Calipers

Order Lookup

Help Desk

Store Locator

In Store Services

Mobile App

CUSTOMER SUPPORT
Accessibility Statement
Contact Us
Forgot Password
Help Desk
In Store Pickup
In Store Services
Order Tracking
Recall Information
Return Policy
Same Day Delivery
© 2026 Advance Auto Parts
Privacy Policy
Terms of Use
Site Map
ADVANCING A WORLD IN MOTION®