Flowtech Long Tube LS Swap Headers - Polished

79-04 Mustang LS Swap; Primary Tube Diameter 1-7/8", Collector Diameter 3"

PART# 12158FLT

$322.95   Suggested Retail
$289.95   Your Price
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* Compatible with AJE K-members, AJE Engine Mounts, and Flaming River Steering Shafts.


Flowtech Exhaust products are the perfect combination of quality and value. We are proud to offer these 1-7/8" Long Tube Headers for 79-04 Ford Mustangs with LS engines. They are available in natural or polished 304 stainless steel.


  • For GM LS engine swaps into 79-04 Ford Mustangs
  • 1-7/8” mandrel bent primary tubes and 3” collectors with merge spears for increased exhaust velocity
  • 3/8” thick header flanges for strength and maximum sealing surface
  • Available in natural or polished 304 stainless steel
  • Gaskets included


Collector Diameter3 inch
Emission Code4
Header FinishPolished
Header StyleLong Tube
Primary Tube Dia.1-7/8 inch
Product TypeHeader
Tube Material304 Stainless Steel
Part Number12158FLT


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

Tech Resources

* Compatible with AJE K-members, AJE Engine Mounts, and Flaming River Steering Shafts.

*Free Shipping & Handling only offered to the contiguous US on orders over $100.

Some parts are not legal for use in California or other states with similar regulations.