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DC Sports 02-06 RSX Base/02-05 Civic Si Ceramic 4-2-1 Header
Part Number: AHC6515

★★★★★ ★★★★★ 4 Reviews
DC Sports 02-06 RSX Base/02-05 Civic Si Ceramic 4-2-1 Header-A1
DC Sports 02-06 RSX Base/02-05 Civic Si Ceramic 4-2-1 Header-A2
DC Sports 02-06 RSX Base/02-05 Civic Si Ceramic 4-2-1 Header-A3
DC Sports 02-06 RSX Base/02-05 Civic Si Ceramic 4-2-1 Header-A4
Images may be for reference only

DC Sports 02-06 RSX Base/02-05 Civic Si Ceramic 4-2-1 Header
Part Number: AHC6515

★★★★★ ★★★★★ 4 Reviews
Was: $509.83
$463.48 & Free Shipping
Save: $46.35 (9%)

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Product Details

Part Number: AHC6515
Brand: DC Sports
UPC: 840879050085

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 / 50 State Legal
  • 2 Year Warranty

Due to the manufacturer's price control policy, this item may be excluded from promotions and discounts

WARNING: This product may contain chemicals known to the State of California to cause cancer or birth defects.

Vehicle Fitment

Acura RSX
2002 Acura RSX Base
2003 Acura RSX Base
2004 Acura RSX Base
2005 Acura RSX Base
2006 Acura RSX Base
Honda Civic
2002 Honda Civic Si
2003 Honda Civic Si
2004 Honda Civic Si
2005 Honda Civic Si

4 Reviews ★★★★★ ★★★★★

★★★★★ ★★★★★
5/5.00 Stars out of 4 Reviews
Write a Review
I'm in love love love!!!!!!
EP3 guy | January 11th, 2021
Absolutely love this exhaust header! In combination with my magnaflow catalytic converter and my invidia N1 cat back exhaust!! My whole vehicle feels sooooo much lighter! I definitely notice a change in fuel economy (i also added a new denso primary O2 censor and NTK Secondary O2 censor) and power!!!!!! Only thing note worthy is, this header does not come with hardware. DC sports explained to me they don
Decent mod for reasonable price
Israel Leon | May 1st, 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.
great product
hrtl5 | October 15th, 2010
Works great no problems
great buy!!!
jeremy fawcett | May 15th, 2010
It is a very nice the looks of it when you look into the car. you'll notice a small amount of gains but not 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...