Flowtech® (11-14) Mustang GT 409SS 1.75" x 2.5" Natural Finish Shorty Headers

  • Sale
  • Regular price $353.95

Compatible: (5.0L)

2011 - 2014 Ford Mustang GT Coupe/Convertible


This part is legal for sale or use on Racing Use Only Vehicles

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

Flowtech Headers are the perfect combination of performance, quality, and value. This header fits the popular 2011-14 Ford Mustang 5.0L V8 "Coyote" engine platform. This header features 1-3/4" primary tubes and a 2-3/4" collector for increased exhaust flow for increasing performance, improving throttle response and providing a broad torque curve. This header accommodates all emission control devices and reuses the factory header gaskets and hardware.


  • Heavy duty 16-gauge mild steel tubing for increased strength and durability
  • Mandrel-bent tubing provide consistent tubing diameter for smooth flow and increased exhaust velocity
  • 1-3/4” primary tube diameter for increased exhaust flow increasing performance and improving throttle response
  • OE style 2-3/4” collector connects to factory exhaust head pipe
  • TIG-welded, machined 7/16” header flange for a leak-free seal and maximum strength
  • Accommodates all factory OE components
  • Available in a raw or polished finishes
  • Headers are a must if you are using a cold air intake, cat-back exhaust system or tuner
  • Retains factory O2 sensors and catalytic converters
Application 2011-2014 Mustang 5.0L
Brand Flowtech
Emission Code 4
Header Finish Natural
Header Style Shorty
Material Mild Steel
Primary Tube Dia. 1-3/4 inch
Product Type Headers
Part Number 12131FLT

Install Guide: