Skunk2 Alpha Header 06-11 Honda Civic Si - k20z3 fa5 fg2

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PRE-ORDER 09/30/2021 ETA

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Skunk2  Alpha Header 06-11 Civic Si

The Skunk2 Alpha Header for the 06-11 Honda Civic Si w/ k20z3 motor w/ free shipping. This highly affordable and powerful header which takes from the design from the race proven megapower header from skunk2. Built from extensive racing and testing this header gives you everything you could need. New manufacturing techniques from skunk2 allow for a high quality well designed header to be produced affordable so any enthusiast can enjoy. The 4-2-1 Tri-Y design comes to the end at 2.5inches, this gives a wide powerband thats usual in all rpms. Skunk2 made the diameter of the primaries as small as possible to help increase exhaust pulse speed, while also monitoring this so its large enough to allow a high peak horsepower as well. A fine line that takes lots of r&d and testing, all done by the very capable skunk2 group.

Specs: 2.5 outlet O2 sensor Cat delete / straight pipe

Part #: 412-05-1930

Fitment: 2006 2007 2008 2009 2010 2011 Honda Civic Si
Sedan or Coupe 8th Generation Honda Civic k20z3 Motor FA5 FG2 Chassis

02 Extension: The O2 Extension is a highly sought after by many but not offered by many shops. We made sure it was here and easy to select for our customers. This o2 wire extension extends the wire due to the skunk2 design puts the o2 bung just a bit further to reach. You can either try to extend it, splice it or purchase this easy plug and play extension to ensure a easy and clean install.

The Hasport rear engine mount is also recommended to help reduce engine rocking which may help prevent the header from hitting the sub-frame.
You can find that here: Hasport Rear Engine Mount 06-11 Civic Si 
WE Suggest 60-72a for most applications.

11 Reviews Hide Reviews Show Reviews

  • 5
    great product

    Posted by Brandon on May 25th 2020

    Removal of the stock exhaust manifold was a complete pain, BUT installation of the Skunk2 Alpha header was a breeze. Everything lined up properly and I didn’t have any issues at all. I even have OEM engine mounts and no header hitting anywhere like a lot of people claim even under hard acceleration. I do recommend replacing the provided donut gasket with an EP3/S2K donut gasket though as that’s the only downfall of this header. Still gets 5 stars from me for overall meeting my expectations.

  • 5
    best header

    Posted by Geovanny Cruz-Sanchez on May 11th 2020

    makes a huge difference in sound and performance !

  • 5
    Better than I hoped!

    Posted by Unknown on Jul 1st 2018

    Installation was straightforward. Uninstalling original header is probably the hardest part. Quality is A1 and shipping was super fast!

  • 5
    Love this header

    Posted by Jerry S on May 11th 2018

    Fast shipping, best site, best pricing and very knowledgeable friendly staff. A+++++++++

  • 5
    Best header on the market

    Posted by Joshua Vang on Feb 24th 2018

    Skunk2 is the best header for your money, Bang for your buck! and Hardmotion made it easier with fast shipping!

  • 5
    Top notch

    Posted by Unknown on Jun 19th 2017

    Love this header so much, top notch, super fast shipping. Be sure to grab the 02 extension just in case, it does help out! +1 for hardmotion for the awesome support and service they will help you out 100%, literally best car guy chat Ive had. Very down to earth and helpful.

  • 5
    1-day shipping!

    Posted by Unknown on Jun 19th 2017

    Thank you for the fast shipping, love the build quality of this header. Skunk2 alpha for the win.

  • 5
    #1 header out

    Posted by Gary G on Feb 6th 2017

    Simple as that, this is the one. Makes most power and is super cheap affordable. Get on this now. +1 to these guys they were super professional btw, they had at my doorstep in 24 hours.

  • 5

    Posted by Unknown on Jan 26th 2017

    Great product, easy install process, sounds and performs great.shipping was fast and easy, great customer service.