K-Tuned 06-11 Honda Civic Si Header 8th Gen 409 Series Steel
K-Tuned 06-11 Honda Civic Si Header
409 Steel Series 4-2-1 8th Gen Civic Race Header
The K-Tuned 4-2-1 Race Header for the 06-11 Honda Civic Si 8th Gen Civic. This 409 Steel series header provides good power, good pricing and also offers a high-flow cat.
- Fits Civic Si with K20Z3 engine.
- 4-2-1 Tri-Y Design - 409 Series Steel
- CNC cut 3/8" thick flanges
- 2.5" Outlet
2006 2007 2008 2009 2010 2011 Honda Civic Si
Sedan or Coupe
This header needs the oem sized piping from full-race for fitment.
Bolts to stock exhaust or any exhaust that has adaptable flange.
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Posted by Unknown on Nov 3rd 2018
Love the exhaust. Paired with the header and race cat it screams
Posted by Alex on Oct 9th 2018
I upgraded to the stainless header offered by K-Tuned and Hardmotion was extremely good with communicating status and updates with me (K-Tuned did not, as I reached out to them regarding the header's damage during shipping).
The Header itself didn't have the best welds and there were a couple of areas where you know flow will be restricted. If you are weird like me and want a HFC, go with a universal and have it welded into the test pipe elsewhere (K-Tuned will charge an additional $80 to have it welded). The HFC also kept the defouler in place.
I have not tuned/Dyno'd yet but I think it feels a little more responsive in mid-high RPMs.
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