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Flowtech Mid-Length Header - Black Painted

1986-87 Buick Grand National, GNX, and Regal T-Type 3.8L Turbo V-6 - Black Painted

PART# 31554-1FLT

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Flowtech Headers are the perfect combination of quality and value. We continue to expand our offering of fully stainless steel headers for both classic and modern cars/trucks. Flowtech's latest addition are new stainless steel mid-length headers for 1986-1987 Buick Grand National, GNX, and Regal T-Type 3.8L Turbo V-6 engines.


  • Made from mandrel-bent 16-gauge 409 stainless steel
  • 1-1/2” diameter primary tubes with 2-1/4” diameter collectors
  • 5/16” CNC machined head mounting flange
  • High quality 100% TIG welded construction
  • Includes 2-1/4” cross-over pipe and turbo exhaust inlet tube
  • Available in your choice of natural, black coated, and silver ceramic finishes
  • Includes header gaskets and mounting hardware
  • Clears all stock accessories
  • Utilizes factory-style ball and socket pipe connections


Collector Diameter2.25 inch
Emission Code4
EngineBuick V6
Header FinishBlack Paint
Header StyleMid Length
Primary Tube Dia.1-1/2 inch
Product TypeHeaders
Tube MaterialMild Steel
Part Number31554-1FLT



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

Breaking in an engine with ceramic coated headers WILL result in damage to the coating and will VOID all warranties. Flowtech recommends using cast iron exhaust manifolds or old headers during your engine break-in period to avoid damaging your coated headers. Please call Holley tech service at 270-781-9741 for additional information regarding ceramic coated exhaust products. The use of header wraps can cause the header tubes to crack or rust due to excessive heat and moisture build-up. Hooker does not recommend the use of header wraps as this will void the warranty.


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