Free Shipping on Orders $100+

Build Your Truck in 3D with RealTruck Builder

Shop at a Dealer Near You

Realtruck - American Innovation

Phone

877-216-5446

New Products
All Truck Bed Covers
Hard Folding
Hard Roll-Up
Soft Folding
Soft Roll-Up
Retractable
One-Piece
Truck Caps
Tonneau Cover Cleaner
BED COVER GUIDE
FIND THE RIGHT BED COVER FOR YOU
GET STARTED
Learn More:
Choosing a Truck Bed Cover
How to Measure your Truck Bed
What is a Cargo Management System?
How Truck Bed Covers affect Deck Rails?
Best Tonneau Covers for 2026
All Truck Caps and Camper Shells
Recreational Caps
Commercial Caps
RealTruck A.R.E. Promos
TRUCK CAP BUILDER
Try our Cap Builder to Customize, Configure, and Create your Ultimate Truck Cap
START BUILDING
All Steps
Running Boards
Electric
Nerf Bars
Sliders
Hoop Steps
Truck Steps
Wheel to Wheel
Bed Steps
TRUCK STEP FINDER
FIND THE RIGHT TRUCK STEP FOR YOU
GET STARTED
Learn More:
What Are Running Boards?
Best Side Steps for Trucks
The Best Electric Running Boards
Running Boards: Does Finish Affect Durability?
Do Nerf Bars and Running Boards Rust?
Deals
- Sale
- Clearance
RealSource
Guides
How-To
Research
Lifestyle
Community
News
Search All Articles
Welcome to RealSource
RealSource™ is the one-stop shop for truck, Jeep® and SUV articles and information. Whether you’re looking for an installation guide, inspirational vehicle build ideas, buyer’s guides, or product comparisons - RealTruck’s team of knowledgeable experts have put together a massive library, and it is at your fingertips
Read More

Home
Performance
Exhausts & Mufflers
Mufflers

Select Your Vehicle

Select Your Vehicle

Year

Make

Model

Body

Bed

Engine

2021 Western Star 4900EX Mufflers

Only display items that ship the quickest

Flowmaster

Magnaflow

Street Series

Borla

MBRP

BBK

Aero Exhaust

Pypes

Moderate

Loud

Quiet

Stainless Steel

Aluminized Steel

Flow-Through

Chambered

Glasspack

Oval

Round

Gas

Raw

Black

Chrome/Polished

Aggressive

31 - 38 of 38 results

Sort By

AERO Exhaust AR Series Resonators

1

From: $89.99

Flowmaster 80 Series Cross-Flow Mufflers

From: $180.95

MBRP Universal Mufflers

From: $209.99

Flowmaster 40 Series Delta Flow Mufflers

1

From: $145.95

Pypes Violator Series Mufflers

From: $106.79

Pypes Turbo Pro Series Mufflers

From: $108.79

Pypes Street Pro Series Mufflers

From: $106.79

Street Series Street Flow Stainless Mufflers

From: $100.99

Prev
1
2

instagram

youtube

tiktok

GET ON THE LIST

Get exclusive savings, insider information, and the latest RealTruck articles sent straight to your inbox.

Shipping to:

ABOUT

Supplier Code of Conduct

Supplier Terms and Conditions

Become a Dealer

Detroit Flagship Store

PRODUCTS

Installation Guides

New Product Ideas

REALTRUCK PEOPLE

Corporate Donations

Trail Access Program

INTERNATIONAL

RealTruck Australia

RealTruck Mexico

RealTruck Thailand

CUSTOMER SERVICE

Order Information

Shipping Information

Warranty Registration

Brand Warranty Policies

© 2026 RealTruck. All rights reserved.

California Supply Chain Act

Terms and Conditions