Mishimoto Downpipe High-Flow Catted Stainless Steel 3" Mustang EcoBoost 2015-2021

88% of 100


  • 3" Tube Diameter
  • 2-Piece Design
  • Mandrel-Bent Stainless Steel
  • High-Flow Catalytic Converter
MSRP $665.95
You save 10%

Mishimoto 3" Stainless Steel High-Flow Catted Downpipe for all 2015, 2016, 2017, 2018, 2019, 2020, and 2021 EcoBoost Mustangs.

Enjoy significant power and torque upgrades on your 2015-2021 EcoBoost Mustang, while still maintaining the proper emissions to remain street legal by ordering this Mishimoto 3" Stainless Steel High-Flow Catted Downpipe. This downpipe uses a 2-piece mandrel-bent tubing design that has been constructed from a 304 stainless steel material, for a durable and reliable performance boost.

Features and Benefits:
- 2-Piece Design
- Made Using Mandrel-Bent Stainless Steel Tubing
- Comes with Metallic Core High-Flow Catalytic Converter for Safer Emissions
- 3" Tube Diameter
- Creates Superior Level of Uninterrupted Exhaust Flow
- Significantly Increases Power & Torque Performance
- Produces Extremely Aggressive Turbo & Exhaust Tone
- Adaptable to Many Exhaust Configurations with 3"-2-1/4" Adapter
- Fits with Manual & Automatic Transmissions
- Includes All Necessary Clamps & Flanges

This downpipe from Mishimoto features a 2-piece design that has been crafted using stainless steel tubing that is mandrel-bent to mount within your S550. The tubing has a 3" diameter and will help maximize the uninterrupted exhaust flow. It will also provide a significant improvement to your Mustang's overall power and torque performance. With Mishimoto’s MMDP-MUS4-15CAT downpipe paired with a custom tune, your engine has the possibility to gain an additional 65whp and 108wtq over its stock counterpart. As you hit the acceleration, the downpipe will help your EcoBoost get that ideal, aggressive turbo and exhaust tone.

This downpipe is incredibly adaptable to a wide-range of exhaust configurations, thanks in part due to its 3"-2-1/4" adapter. This adapter can also be omitted, so the downpipe will use its 3" V-band outlet to help mate up to other cat-back exhausts and other mid-pipe combinations. This also helps it fit on your Mustang whether you have an automatic or manual transmission.

Mishimoto's MMDP-MUS4-15CAT downpipe also features a catalytic converter that has a 200 cell spun metallic core within its interior. This catalytic converter is what allows the downpipe to be street legal, so you can enjoy the overall exhaust flow performance improvements whether you’re on the track or cruising down the street. This downpipe will also include all of the necessary clamps and flanges and will mate perfectly to your original turbo gasket.

Please Note: This downpipe can't be used with stock ECU programming, so you'll need to retune your Mustang's ECU after installing this downpipe.

California Residents: Proposition 65 Warning

Installation Videos

Vehicle Fitment

This product will fit the following Mustang years:

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