GM 3.9L V6 Headers

Complete Header Set for the GM 3.9 V6

100% 304 Stainless Steel Construction

TIG Welded

3/8" Thick Flanges

1-5/8" Primaries

2.5" V-Band Collectors with self-centering machined steps

Includes custom cut header gaskets

Includes three 3/16" thick 304ss EGR port caps

Block hugging design allows maximum clearance for packing other items in engine bay.

Allows use of standard block mounted motor mounts using the plates found here, GM 3.9L V6 Motor Mount Plates – Hulse Engineering

Mating 2.5" V-Band rings and clamps will be required to attach your exhaust system, I recommend the following from JMD Tubes (make sure to select the 2.5" option),

• V-Band Rings - JMD Tubes - Machined Stainless Steel V-Band Rings #VBRM-SS-
• V-Band Clamps - JMD Tubes - V-Band Clamps #VBC-SS-

Recommended to use header silicone gasket maker to seal EGR port caps.

Does not include mounting hardware, mating V-Band rings, or V-Band clamps.

These are for custom vehicle applications only, no guarantee of fitment on any OEM vehicle that the 3.9L V6 came in.