ETS V2 MaxFlow Header 2004-2021 Subaru STI

Rated 5.0 out of 5
Based on 1 review
Exhaust Headers

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Fitment Information:

2004-2021 Subaru STI


  • 1 7/8" primary runners with 2 1/2" secondary for maximum flow.
  • CNC mandrel bent runners.
  • Custom .100 USA made thick wall tubing for durability.
  • Low angle 4-1 merge collector for maximum flow and exhaust scavenging. 
  • Slip fit connection for ease of removal and installation.
  • 2-bolt or Vband up pipe flange options.
  • Stock replacement design.
  • Low profile design for maximum clearance. 
  • Surfaced flanges for a leak free seal.
  • 304 Stainless steel construction.
  • 100% built in house and made in the USA.

We designed our ETS V2 MaxFlow Header to be a direct factory replacement header.  We start off with large 1 7/8 primary runners that come together in a true low angle 4-1 merge collector that then flow into a huge 2.5" secondary for maximum scavenging and exhaust flow.

average rating 5.0 out of 5
Based on 1 review
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100% of reviewers would recommend this product to a friend
1 Review
Reviewed by Andrew N.
Verified Buyer
I recommend this product
Rated 5 out of 5
Review posted

"hybrid style headers"

I usually wait until ive installed and used a part to review (avoid the ubiquitous "haven't installed but the quality/packaging is cool" pointless review) but i feel it might be helpful to add about these that they dont appear to be 'true' equal lengthers but rather something that is much closer to being equal than stock or the headers labeled as unequal specifically, but not exactly having all runners being the same length. Which by the way, far from being a complaint, it is precisely why i decided that these were my best choice, they are clearly very high quality and from other reviews appear to have some of the biggest gains of any available but also perhaps just as important to many people will retain the subaru rumble to some degree. It will sound different im sure probably not AS 'rumble-y' but not 'honda-ey' (gross) either. I roughly measured the lengths of the runners and each pair does seem to be precisely equal: longer side= ~24-25" shorter side= ~17-18". Cant wait to install them tomorrow i love doing headers :D

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