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SKUNK2 Alpha Series Header Civic Si 06-11 4-2-1 Tri-Y K20Z3 Racing Honda K20 for Sale

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SKUNK2 Alpha Series Header Civic Si 06-11 4-2-1 Tri-Y K20Z3 Racing Honda K20

Price: $450

This item has been shown 4443 times.

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Skunk 2

You are looking at a Skunk2 Alpha Series Header

Item # - 412-05-1930

Skunk2 is proud to announce its all-new Alpha Series Header for the ’06-’11 Civic Si. Patterned after our already popular and dyno-proven MegaPower Headers, which have been used by leading, competitive race teams for years, Skunk2’s Alpha Series Header employs many of the same design characteristics and technology. Our decision to produce the Alpha Series Header was driven by our desire to make our race-proven design more affordable and accessible to everyday enthusiasts. New manufacturing techniques allow us to do so at a lower overall cost, making race-winning header technology available to everyone. Skunk2’s Alpha Series Header for the eighth-generation Civic Si offers Skunk2 performance, industry-leading customer service, and a full warranty policy, all at a price comparable to lesser budget-minded headers. Unlike the budget-minded headers, though, only Skunk2 Alpha Series Headers ensure precise fitment and the peace of mind of knowing that a Skunk2 representative is just a phone call or email away.

All Skunk2 headers are designed and engineered to maximize exhaust flow and increase both horsepower and torque throughout the powerband. The unique design is the result of more than a decade of racing experience coupled with computerized modeling and extensive dyno testing. Each Skunk2 Alpha Series Header features equal-length, sequentially paired, stepped primaries and a 4-2-1 tri-Y design that terminates into a collector with a 2.5-inch outlet. These features, paired with Skunk2’s unique design specs, provide an extremely broad powerband that’s applicable to a wide range of engine sizes and configurations. Alpha Series Headers also feature the smallest possible primary tubes required to achieve optimum overall and peak power. By minimizing the primary tubes’ diameter, Skunk2 is able to maintain the highest possible exhaust gas speed throughout the header, which improves mid-range power and throttle response significantly. Skunk2’s Alpha Series Header provides the perfect combination of top-end power without sacrificing mid-range performance or throttle response.

Please Note:

  • O2 sensor bung thread pitch: M18 x 1.5
  • Includes adapter flange, gasket, and mounting bracket.

Fits the following vehicles:

  • 06-11 Honda Civic SI


Buy with confidence! Skunk2 Racing will only honor warranty and product support issues for purchases from Authorized Skunk2 Racing Dealers or Etailers. All new Skunk2 Racing products come with a 12 month, unlimited mileage warranty. To learn more about our all new conditional warranty or to verify if this seller is a Skunk2 Authorized Etailer, please contact Skunk2.

Contact us today for all your Skunk2 needs

NYE Motorsports Policy
Please Read Before offerding


  • We accept PayPal. (All major credit cards accepted through PayPal)
  • Payments must be received within 5 days after close of sale. Unpaid sale will be forfeited after seven days and a Non-Payer report will be filed with to recover the closing fees of the sale.

Shipping & Handling

  • All items are shipped out via Fed Ex, UPS, USPS or DHL it is our preference which one we choose. Shipping and handling fees are non refundable.
  • Products will be shipped out within 1 business days after we receive the payment, except for weekends and international orders.
  • FPO, APO, GU, and VI do not qualify for free shipping. It is your responsibility to contact us for an individual shipping quote for these areas. If you place an order without contacting us first there will be a delay in processing your order.
  • If your item is being shipped internationally, you are responsible for paying all fees, taxes, and any expenses above and beyond the normal purchase and shipping price. Please contact us via email before making a purchase. Please include your phone number on any international order. It is needed for shipping purposes.

Return & Exchange Policy

  • Please contact us for all return inquiries.
  • We gladly accept returns for refund on most new, un-installed, and undamaged items in original packaging (all original package contents must be included) within 14 days of the order delivery date.
  • All returns are subject to a 20% restocking fee.
  • If you have installed the item that you have purchased or if your item is special order, it is not eligible for a return.
  • When making an approved return please make sure that everything is in brand new condition with original unopened package. Parts must not be damaged in anyway and must include all pieces and parts that were originally included in the package.
  • All eligible purchases can be returned no matter the reason for up to 14 days from the date of delivery.
  • Return shipping is the buyers responsibility.
  • Any additional shipping charges from the original purchase will not be refunded. Usually applies to any order shipped outside the continental 48 states.
  • In the case of an error or an incorrect item was shipped all return shipping costs will be refunded to the customer upon NYE Motorsports receiving the item and there will be no restocking fee charged.
  • Any returns that are sent without our knowledge will not be accepted.


  • At NYE Motorsports we believe that if you honor your purchasing commitments then you deserve response regardless of whether or not you leave us response. However a positive rating and good response from you allows us to give you the best possible customer service and the lowest prices. So please leave us response. Positive response will automatically be left for you.

Additional Information

  • Orders placed Monday-Thursday or Friday before 4:30 pm EST. will ship out that week. Any order that is placed after 4:30 pm EST. on Friday on through Sunday will ship the following Monday.
  • Due to the nature of E-commerce, on occasion there might be a situation where an item becomes sold out just after a purchase is made. If this happens you will be notified via email and given the option of having your entire purchase price refunded or the option of waiting until your item becomes available.

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