Flowtech® (11-14) Mustang GT 304SS 1.75" x 2.5" Polished Long Tube Headers

  • Sale
  • Regular price $556.95

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 quality and value. These Full Length (Long Tube) stepped style headers fit the popular 2011-2014 Ford Mustang 5.0L V-8 models.


  • Mandrel-bent 409 Stainless Steel (12135FLT and 32139FLT) or 304 Stainless Steel (12139FLT) tubes provide consistent tubing diameters for smooth flow and increased exhaust velocity
  • Heavy duty 16-gauge tubing for increased strength and durability
  • Smooth transition, 1-3/4” to 1-7/8" stepped diameter primary tubes are used for increased exhaust flow increasing performance and improving throttle response
  • OE style 2-1/2” ball and socket collector connects to factory exhaust head pipe with no cutting or welding
  • TIG-welded, machined 3/8” header flange for a leak-free seal and maximum strength
  • Premium aluminum header gaskets included
  • Available finishes include Natural, Polished, and Silver Ceramic Coated finishes
  • These headers are a must upgrade if you are using a cold air intake, cat-back exhaust system or tuner

Application 2011-2014 Ford 5.0L
Brand Flowtech
Collector Diameter 2.50 inch
Emission Code 4
Engine Ford Coyote
Finish Polished
Header Finish Polished
Header Style Long Tube
Material 304 Stainless Steel
Primary Tube Dia. 1-3/4 inch /1-7/8 inch
Product Type Headers
Part Number 12139FLT