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DC Sports 02-06 RSX Base/02-05 Civic Si Ceramic 4-2-1 Header

Part Number: AHC6515

5 out of 55 out of 55 out of 55 out of 55 out of 5 3 customer reviews
$312.96 USD Free Shipping

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3 In Stock


Countless hours of research and development went into the creation of this header. The change in the design of the factory exhaust system presented a new set of challenges for DC Sports engineers.

With the stock catalytic converter welded to the secondary, the R and D Department had to find a way to create power out of the primary only. Computer aided design and extensive dyno testing led to our successful collector design. The result of our labor is a header that works with the factory secondary to produce power throughout the RPM range.


  • 9.4 HP Gain at 6700 RPM
  • 7.2 ft/lb Torque Gain at 6800 RPM
  • Available in ceramic coated mild steel and T-304 stainless steel
  • Mandrel bent tubing
  • CNC Machined Flanges
  • CARB Exempt
  • 2 Year Warranty


Brand: DC Sports
Part Number: AHC6515

Customer Reviews

5.0 out of 5.0 5 out of 55 out of 55 out of 55 out of 55 out of 5

3 Total Reviews

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Most Recent

5.0 out of 5.0 5 out of 55 out of 55 out of 55 out of 55 out of 5

Decent mod for reasonable price

By Israel Leon on 5/1/2011

Install was simple but I did run into a few issues. I disliked how DC Sports does not include a donut gasket for the header. I had to wait a whole day to get a gasket shipped to my house since all of the stores in town (Acura dealer included) did not have the part in stock. Besides that, the overall product worked fine. My car feels lighter and I did notice an increase in strength throughout the whole power band. The performance gained feels balanced and that is what I was looking for. I am more than satisfied with the results. If you are considering adding this header to your vehicle I highly recommend purchasing a donut gasket. All in all, you will not be disappointed with the 4-2-1 header.

5.0 out of 5.0 5 out of 55 out of 55 out of 55 out of 55 out of 5

great product

By hrtl5 on 10/15/2010

Works great no problems

5.0 out of 5.0 5 out of 55 out of 55 out of 55 out of 55 out of 5

great buy!!!

By jeremy fawcett on 5/15/2010

It is a very nice item...love the looks of it when you look into the car. you'll notice a small amount of gains but not much...one problem that did come up was the header screw holes that were supposed to bolt to the bracket were not threaded...planning to go to a shop to get that fixed...

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