SKU: 2773920811

DC Sports K Swap 4-2-1 Header

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Description

DC Sports K Swap 4-2-1 HeaderIntroducing the DC Sports K Swap 4 2 1 Header. This header is designed not only to address common K swap installation challenges but also to deliver usable power gains. With its one piece 304 stainless design, CNC machined flanges, and equal length Tri Y layout, it ensures optimal exhaust flow and performance. Optimized Tri Y 4 2 1 Design Compatible with K20 and K24 Swaps Fits 92 00 Civic, 94 01 Integra, & 93 97 Del Sol Works with Hasport or

Introducing the DC Sports K-Swap 4-2-1 Header. This header is designed not only to address common K-swap installation challenges but also to deliver usable power gains. With its one-piece 304 stainless design, CNC-machined flanges, and equal-length Tri-Y layout, it ensures optimal exhaust flow and performance.

  • Optimized Tri-Y 4-2-1 Design

  • Compatible with K20 and K24 Swaps

  • Fits 92-00 Civic, 94-01 Integra, & 93-97 Del Sol

  • Works with Hasport or Innovative Mounts

VEHICLE FITMENT AND COMPATIBILITY

Engineered to fit 1992-2000 Honda Civics, 1993-1997 Honda Del Sol, and 1994-2001 Acura Integras, this header is compatible with both K20 and K24 engine swaps using Hasport or Innovative mount kits. Hasport mounts accommodate two height positions, while the header works perfectly in both. For Innovative mounts with forward and back positions, the header optimizes performance in the most forward configuration. See the fitment section below for exact fitments. 

HEADER DESIGN AND PULSE TIMING

The equal-length 4-2-1 layout mirrors Honda's original engine design, pairing cylinders 1-4 and 2-3 to match the 1-3-4-2 firing order. This configuration maintains consistent 360-degree spacing across the 720-degree cycle, allowing the low-pressure wave from one cylinder to reach the next during overlap. The result is enhanced scavenging, reduced exhaust reversion, and a more consistent torque curve.

At the head, DC precisely opened the flange ports to match the PRC Type R oval profile. The 304 stainless steel head flange starts as a 1/2-inch plate and is CNC-machined down to 3/8 inches in low-stress areas to reduce weight while maintaining flatness and rigidity. Strategically reinforced zones remain at 1/2 inch to prevent warping and ensure a tight seal.

RUNNERS, WELDS, AND COLLECTOR GEOMETRY

Each primary runner is precision mandrel-bent from 304 stainless steel, featuring a 1.5-millimeter wall thickness. The runners are flared to match the PRC oval port shape and seated approximately one-quarter inch into the CNC-machined flange. DC implemented full internal and external flange welds to maximize penetration, ensure optimal sealing, and minimize potential cracking during repeated heat cycles.

The runner sizing follows a carefully calculated stepped design to balance velocity and flow:

  • Primaries start at 48mm
  • Step to 50.8mm
  • Merge at roughly 15 degrees into 54mm secondaries
  • Finish with a 7-degree transition into a 63.5mm 2.5-inch collector

Each dimensional and angular specification is precisely calculated to optimize exhaust scavenging and overall system efficiency. 

OUTLET LOCATION AND O2 SENSOR PLACEMENT

The outlet is positioned near the tunnel centerline, taking into consideration common K swap shifters and cables. Routing is planned so everything fits without subframe hammering or complicated mid pipes, and the header lands where it should while preserving ground clearance for lowered cars. A 2.5-inch stainless flex bellow between the header and collector absorbs engine movement and protects the welds, and allows you to easily weld it up to your exhaust of choice with the included two-bolt flange that comes in the box. 
Lastly, many swap headers install a single O2 bung in a position that places the end of the O2 sensor where it can rub against the floorpan. DC includes two oxygen sensor bungs and position them to clear the chassis and protect wiring. This allows you to run both the OEM primary and secondary sensors, or you can plug the second port and use it for quick wideband access at the dyno. The goal is simple: remove installation issues for a clean and easy install.
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SKU: 2773920811

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ediebegonia
Carnegie, US
★★★★★ 3
Pack's Promise was okay but not great
Format: Kindle
Pack's Promise was okay but not great. I won't recommend it to anyone that I know. PRO: * Very likable characters * Lots of steamy scenes that are written very well * The spelling and grammar are good * The punctuation is good with the exception of using hyphens instead of commas. Lots of hyphens. Lots and lots of hyphens. CON: * Almost no interactions with any characters outside of Madison and the pack * Nearly no plot. They meet, get together for a heat, agree to make it permanent, done * Quite a few typos such as extraneous words, missing words and words out of order THINGS TO KNOW: * More steamy scenes than storytelling * A lot of MM & MMM, some MFMM during heat
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Reviewed in the United States on January 5, 2023
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LJM
San Leandro, US
★★★★★ 5
such a good read
Format: Kindle
Madison, Lucas, Grey and Rian were made for each other!!! First time reading from this author and I’m not disappointed!!! Absolutely love the Love in this book and couldn’t ask for a better OV!
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Reviewed in the United States on October 25, 2023
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Beccaroo
Waukegan, US
★★★★★ 4
Fluffy and Nice Omegaverse
Format: Kindle
… this would have made 5 stars but for 2 reasons. A.) there were quite a few typos; misspelled words, missing quotations, “the his” mistakes, and various signs that maybe a proofread would do good. B.) the writing was quite textbook. Late blooming omega is struggling with her new self, finds a absurdly wealthy pack of alphas, every thing is almost insta-love but she resists, then decides to love herself and let everyone be happy. Rian was my favourite (obviously the author’s favourite too because he got the most page time) but I wish we could see more of his CEO side? He went to work maybe ONCE the entire time. Gray was supposed to be the “growly one” but he turned out to be puppy dog. Lucas was a genius brainiac doctor - but also super alpha with an aggressive hindbrain with a breeding k*nk?? And then there was no actual “breeding”?? Spice 3/5 - normally omegaverse books are super high on messy smut but this was tamer. Romance 3/5 - insta-love that was then resisted because of personal hangup’s Plot 2/5 - weird paced head hopping, showing the same scene from different POV’s that made me feel like it was 2 steps backward, 1 step forward. Humour 4/5 - there were a dozen lines that genuinely made me chuckle out loud Would have been five stars but the lack of proofreading and the predictable plot made me unable to get up to ADORED IT level - four stars is still and official ENJOYED IT, y’all. This isn’t a bad rating. The “Club Heat” has intriguing possibilities so I’m going to give the second one a shot.
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Reviewed in the United States on March 31, 2023
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Ruth Ann Burt
Phoenix, US
★★★★★ 5
Great book
Format: Kindle
I absolutely feel in love with all 4 characters!!! The bedroom scenes were 🌋🌡🔥🔥🔥. I couldn't put this book down!!! I'm hooked for the whole series Book 2 here I come!!!!! Its a fun easy book and story to read!!
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Reviewed in the United States on October 4, 2024
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Danyelle
Lake Worth, US
★★★★★ 4
Fun with a late blooming omega
Format: Kindle
I like this book. The story is fun, cute, and sexy. There's just a little drama, some excellent, steamy scenes, and a fairly good relationship building storyline. I especially like how all the main characters are a bit older than the usual 20 somethings I tend to see in this kind of book. Having said that, I wish there were more descriptions of the places, as well as the food in the fancy restaurant. I enjoyed the cocktails at the club, so I missed that kind of detail when Gray took Madison on a dinner date. I also wish there had been more interaction between Lucas and Madison, and Lucas and Rian. It felt a bit lopsided, with a focus on Rian, Madison, and Gray. I wish it had been proofread - there are a lot of typos, but nothing too distracting.
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Reviewed in the United States on September 12, 2022

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