MBRP Cat-Back Exhaust System Street 3" Stainless Steel XP Series Fastback GT 2015-2017

96% of 100


  • 3" XP Series Cat Back
  • Stainless Steel Construction
  • Dual 4-1/2" Polished Tips
  • Direct Bolt On Installation
MSRP $809.11
You save 24%

MBRP Stainless Steel XP Series 3" Street Cat-Back Exhaust System for 2015, 2016 and 2017 Fastback GT Mustangs.

So, you just picked up your brand new 2015-2017 Fastback GT Mustang from the dealer, and upon starting up your new pony, you realize she is way too quiet. Well, don’t fret! MBRP has recognized this tragedy is a common problem for Mustang owners and released their brand new Stainless Steel XP Series 3" Street Cat-Back Exhaust System to solve the issue!

Features and Benefits:
- Tame, Yet Pronounced Street Version
- Large 3” T409 Stainless Steel Piping for Maximum Flow
- Polished 4-1/2” Tips for Head-Turning Style
- Utilizes Included H-Pipe for Aggressive Tone
- 100% Bolt-On Installation

*Will NOT fit convertibles.

An MBRP performance exhaust system is the starting point to getting the most from your cold air intakes, tuners and other bolt-ons. Paired with a set of longtube headers, this system will not only sound amazing, but also show immense power gains. Aiding in those power gains is a high-flow H-Pipe and large 3” mandrel-bent stainless steel piping all topped off with flashy 4-1/2” polished tips.

Installation is a breeze with a lift and not too bad with a jack, considering it’s a 100% bolt-on installation with basic hand tools. MBRP designed this exhaust system with longevity in mind considering it features rugged 16-gauge T409 stainless steel construction that will withstand whatever the road throws at it. Right out of the box, this cat-back system is polished to give off a show quality mirror finish to match the tame, yet pronounced exhaust tone.

The 5.0L Coyote engine from Ford has been around for a few years and makes a huge amount of power, but the exhaust note just isn’t there to back up the powerhouse that lies under your hood. This cat-back system from MBRP will take your S550 to the next level without making your ears ring. The exhaust notes of this particular system are subtle and civilized during normal driving, but quite aggressive when your gas pedal hits the floor.

Order MBRP’s Stainless Steel XP Series 3" Street Cat-Back Exhaust System for your 2015-2017 Fastback GT Mustang from CJ Pony Parts today!

California Residents: Proposition 65 Warning

Installation Difficulty


Intermediate skill is required for this installation.

Installation Videos

Video Transcript

We've been a fan of MBRP's exhaust systems ever since we installed one in our previous 2013 Got-To-Have-It Race project car. We recently installed their 2015 system, and the Race sounds killer on that car as well. The Race is on the loud side though, it's not for everybody. If you're looking for something a little more mild but still want that muscle car tone that MBRP provides, they offer the Street System and today I'm going to show you how to install that. Like the Race System the Street System is also available in aluminized or stainless steel and is an excellent value for a Cat-Back system for your 2015 Mustang.

It starts by replacing the resonator with a true H-pipe to give you that muscle car sound and goes through true 3 inch mandrel-bent pipes, through a set of their street mufflers and even a set of 4 and 1/2 inch polished tips.

We're going to start with some sound clips of the factory exhaust. First a few in our studio and then we'll take it for a ride.

For this installation your going to need a lift or a jack and jack stands, 3/8" ratchet, 13mm shallow socket, 15mm socket, 8mm Alan key, 6" extension and a flat blade screwdriver.

Like we've shown you many times in the past, removing the stock exhaust system is actually quite easy but we do suggest a second set of hands to make it easier.

The first thing you want to do, remove the two bolts for the two rear brackets. Don't worry about removing the bolts. There's actually a little hook so they're not going to fall off.

Now we move forward and loosen the clamps that hold the resonator to the front parts.

And we want to move this little tab up. Little stud that will stop it and then you can slide the clamp down.

Now you can pop these little hangers off here.

Okay, now the weights going to go forward and you sort of shimmy the system forward off the rear clamps.

We're going to remove these clamps off the factory pipes. Move them over to our MBRP.

First we're going to install the factory clamps back on the factory pipes. I'll grab our new H-pipe.

Install the H-pipe with these flat sections with the circles facing downward.

Now we'll just snug them up a little bit.

To install the MBRP, we also have to remove the rear hanger bracket to the tail pipe. There's one bolt here and one up on the side.

To prepare the new pipe for installation we're going to install all the factory hangers as well as the new clamp.

Alright, now we're going to tighten the front clamp to the H-pipe.

Now you can put the tip up into place and you can kind of put it wherever you want, as far as you want. Usually try to line it up right with the edge here. And repeat the process on the other side.

Has a very aggressive tone as well. Very similar to the Race, just a little bit less volume overall, but still that nice deep tone and idle and an aggressive sound when you hit it.

Considering how loud it is outside the car, it's actually surprisingly quiet inside the car. There you go, there's 60 miles per hour, 2 grand. I would say a hint of a drone at most. This wouldn't bother me at all for daily driving, for long highway commutes, whatsoever. You can really barely hear it. Even with acceleration, you can hear the aftermarket exhaust, it's not overbearing at all. Definitely considering how loud it is outside the car.

Has a nice deep tone at idle, too. Just sitting at a traffic light you can definitely hear it's an aftermarket exhaust but it's got a nice tone to it. I mean it's a really muscle car sound, a really deep muscle car tone.

If you like the sound of the Race system and want something a little more mellow, the street is going to be the perfect choice. You still get that nice deep tone from the H-pipe. The Street muffler just keeps the volume a little bit lower. Inside the cabin it's nice and quiet but still has a nice aggressive sound outside. As far as bang for the buck, MBRP's going to be tough to beat.

For more installation videos for your 2015 Mustang, you should subscribe to our YouTube Channel and check out CJ Pony Parts for the best selection of Mustang Exhaust.

Vehicle Fitment

This product will fit the following Mustang years:

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