2015-17 Mustang SLP Loudmouth 1 Axle Back Exhaust Kit 5.0 by SLP

Details   |  Description   |  Videos
  • 620054  15-17 5.0L SLP LM1 AXL
  • 620054  15-17 5.0L SLP LM1 AXL
  • 620054  15-17 5.0L SLP LM1 AXL
  • 620054  15-17 5.0L SLP LM1 AXL
  • 620054  15-17 5.0L SLP LM1 AXL
  • 620054  15-17 5.0L SLP LM1 AXL
  • SLP-620054
  • SLP-620054
  • SLP-620054
  • SLP-620054
  • SLP-620054
  • SLP-620054

Replace your restrictive factory axle backs with this Loudmouth 1 kit from SLP, to give your 2015-2017 Mustang a much deeper exhaust tone!

Item #SLP-620054
MPN# 620054

Your Price: $399.95

Market Price:$419.95
You Save 4.76 % ($20.00)

In Stock Ships tomorrow!

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  • Increased Performance
  • Improves Exhaust Tone
  • 50 State Legal
  • Cut & Clamp Design


  • 2.5" Mandrel Bent Tubing
  • 4" Stainless Steel Tips
  • Pre-welded Hangers
  • Stainless Steel Construction

What's in the Box

  • (2) 2.5" Exhaust Flow Tubes
  • (2) 4" Tips
  • (4) Exhaust Clamps

Product Description

SLP Loudmouth 1 Axle Backs
If you're tired of the quiet and restrictive stock exhaust, and want to upgrade the axle back's on your 2015-2017 Mustang for a much deeper tone, then this kit from SLP is just what you're looking for! Not only will this kit give you better performance over stock, due to being constructed with minimal bends, but the stainless steel construction will give you a sleek new look as well! Exhaust hanger's come pre-welded in the factory locations for a direct replacement installation. Included in this kit are two 4" tips, made from custom tailored 304 stainless steel, for a long lasting, durable finish, as well as 4 exhaust clamps, to connect everything together.

Installation Note
This kit is a cut and clamp design. You'll have to cut your factory Axle Back off and use the included clamps to install this SLP kit.

Constructed as a straight through system, this kit is designed with no sound deadening material or resonators. Check your local noise ordinance laws for legality.

-Fits 2015-2017 Mustang 5.0

California Residents:

WARNING: Cancer and Reproductive Harm- www.P65Warnings.ca.gov

Product Videos

2015-2017 Mustang GT SLP Loudmouth 1 Axle Back Exhaust - Sound Clips

Check out our YouTube channel for even more tech tips, installation videos, how-tos, and more. The best place to go for anything Mustang related!

Customer Photos (0)

Vehicle Applications

Ford Mustang - 2015 (15) - 2016 (16) - 2017 (17)

About This Brand

SLP - Packaged Performance, Guaranteed Horsepower
SLP's Loudmouth exhaust is one of the most recognized systems on the market! They strive to offer the highest quality aftermarket components for Latemodel Mustangs! Their high quality exhaust components increase power, performance, and give your Mustang a louder exhaust tone for that true American muscle car sound. Choose from a variety of cat back, axle back, and resonator kits for your Mustang at LatemodelRestoration.com.

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