My Account
My Garage
Shopping Cart

Shopping Cart

0 items in your Cart
View Cart
Subtotal
Track
My Order
MY GARAGE Select Vehicle
MY GARAGE

Flowmaster 817821 Outlaw Axle-Back Exhaust System with 4-Inch Polished Tips

(2018-2023 Ford Mustang)

Part of: Flowmaster Outlaw Axle-Back Exhaust System with Tips

Other options in this family: Flowmaster 817713 Flowmaster 817752 Flowmaster 817806 Flowmaster 818125

Manufacturer

Picture for manufacturer Flowmaster

Part Number

817821
9 reviews
Sale Price

$1,065.95

4 left at this price

delivery box

Usually delivered within 2 days

free shipping

FREE SHIPPING

Check out with

ApplePay
Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Flowmaster 817821 Outlaw Axle-Back Exhaust System delivers an aggressive, race-inspired sound combined with proven performance gains. This bolt-on system features Flowmaster's legendary Outlaw mufflers, dyno-tuned to maximize horsepower and torque while producing a deep, throaty exhaust note that enthusiasts demand.

Key Features:

  • Full stainless steel construction for maximum durability and corrosion resistance
  • Aggressive race-proven Outlaw mufflers for bold sound and performance
  • Large 4-inch polished 304 stainless steel tips for a premium appearance
  • Direct bolt-on installation using factory hanger locations—no cutting or welding required
  • Dyno-tuned design optimized for maximum performance gains
  • Backed by Flowmaster's Lifetime Limited Warranty

This axle-back system is designed for straightforward installation, making it an ideal upgrade for enthusiasts looking to enhance both the sound and performance of their vehicle. The mandrel-bent tubing ensures smooth exhaust flow, while the high-quality stainless steel construction guarantees years of reliable service.

Products specifications

Fits

2018-2023 Ford Mustang

Brand

Flowmaster

Prop 65

Yes

California Proposition 65 Chemical Name

Chromium (hexavalent compounds)

California Proposition 65 Chemical Name

Nickel (Metallic)

Catalytic Converter Included

No

Catalytic Converter Quantity

0

Category

Exhaust

Clamping Type

Flat Band

Clamps Included

Yes

Emission Code

5

Exhaust Series

Outlaw

Exhaust Tip Color

Silver

Exhaust Tip Connection

Welded

Exhaust Tip Cut

Angled

Exhaust Tip Edge

Angle Cut

Exhaust Tip Finish

Polished

Exhaust Tip Intercooled

No

Exhaust Tip Length

5.25

Exhaust Tip Material

304 Stainless Steel

Exhaust Tip Quantity

4

Exhaust Tip Resonated

No

Exhaust Tip Shape

Round

Exhaust Tip Wall

Double Wall

Exit Style

Dual Out Rear

Finish

Natural

Gasket Or Seal Included

No

Grade Type

Performance

Hangers Included

Yes

Heat Shield Included

No

Inlet Type

Clamp-On

Mount Type

Uses Factory Hangers

Mounting Bracket Included

No

Muffler (Left) Body Width

4.00

Muffler (Left) Type

Reflection

Muffler (Right) Type

Reflection

Muffler Body Length

6.50

Muffler Body Material

409 Stainless Steel

Muffler Body Shape

Round

Muffler Color

Black

Muffler Finish

Black High-Temperature Paint Finish

Muffler Flanged Inlet

No

Muffler Flanged Outlet

No

Muffler Inlet Connection

Slip-Fit

Muffler Inlet Location

Center

Muffler Outlet Location

Center

Muffler Outlet Quantity

1

muffler part number

Kit Only

Muffler Quantity

2

Muffler Series

Outlaw

Muffler Type

Reflection

Pipe Color

Silver

Pipe Material

409 Stainless Steel

Product Type

Exhaust System

Sound Level

Aggressive

Spring Bolt Kit Included

No

Sub Category

Exhaust and Tail Pipes

Tail Pipe Quantity

2

Tail Pipe Quantity

Dual

Tail Pipe Tapered Outlet

No

Tip Logo

Embossed

Type

Axle-Back

Valve Included

No

Valve Type

Not Applicable

Warning

California Proposition 65

Use them

First time ordering from this site. So far so good.

Easy

Good Price and Shipping!

good

best price, fast and easy. Hopefully will be quick delivery also

Prices were the best I could find on the internet

Thanks

Ordering was simple and shipped quickly. Received undamaged and exactly what i ordered. will order from them again.

Share icon
Return Policy
Returns are easy at Autoplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy