Flowtech® (05-10) Mustang GT 1-5/8" x 2-1/2" CARB 409SS Shorty Headers

  • Sale
  • Regular price $387.95

Compatible: (4.6L)

2005 - 2010 Ford Mustang GT


50 state legal - CARB EO D-115-19

This part is legal for sale and use on Emissions Controlled Vehicles, in all 50 states, when used in accordance with the manufacturers application guide because it has a California Air Resources Board (CARB) Executive Order (EO) number.

The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle

Flowtech Headers are the perfect combination of quality and value. This shorty header fits the popular 2005-09 Ford Mustang GT V8-4.6L and bolts up to the factory exhaust. 50 state legal - CARB EO D-115-19


  • 50 state legal
  • High flow, mandrel-bent tubes provide consistent tubing diameters for smooth flow and increased exhaust velocity
  • Heavy duty tubing and high quality welds for increased strength and durability
  • Smooth transition, 1-5/8” diameter primary tubes are used for increased exhaust flow increasing performance, improving throttle response and broadening the torque curve
  • 2-1/2” collector used for high tuck design and maximum exhaust component clearance
  • Machined 3/8” header flange for a leak-free seal and maximum strength
  • Premium aluminum header gaskets and installation hardware included
  • Heat resistant black paint for a stealthy look
  • Shorty header design mounts to factory exhaust system
  • Accommodates all emission control devices


Brand Flowtech
CARB (California) Compliant Yes
CARB EO# D-115-19
Collector Diameter 2.50 inch
Emission Code 1
Engine Ford Modular V8
Flange Size 3/8 Inch
Header Finish Black Paint
Header Style Shorty
Primary Tube Dia. 1-5/8 inch
Product Type Headers
Part Number 12124FLT

Install Guide: