SKU: 2773920811

DC Sports K Swap 4-2-1 Header

Sale price$256.50 Regular price$285.00
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 12 - Jul 17

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

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.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 2773920811

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.2 ★★★★★
Based on 1547 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
D
Verified Purchase
Danyelle
Charlottesville, 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.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 12, 2022
J
Verified Purchase
Jennifer G
Lake Worth, US
★★★★★ 3
Madison Deserved Better
Format: Kindle
Madison was a beta...except she wasn't any longer. She was a late presenting Omega. And she was struggling. She was tall and thin, not tiny and curvy. She was opinionated. She was everything an Omega was not. After suffering through her first heat, her friends took her to Ardor, a club where Omegas came to safely find Alphas. She's not expecting much but then she connects with a sexy beta. And when she meets his Alphas, they set her body on fire. Maybe, she's found her no-strings-attached heat pack. Maybe, she's found something more. I could not connect with the characters in this book, so their story never resonated with me. And there was no love story; there was sex. Grey made it clear from the beginning that he had a true love and it was his beta boy, Rian. He went so far as to reassure Rian “Say the word, I’ll never touch her again. Lucas can put the babies in her. I only need you, beta boy”. So, Madison was there for babies, no emotions needed. Nice. No, thank you. I want the Omega to be the center of their world, not an incubator. Lucas and Rian weren't any better. After her heat, they let her leave. Not one of them made her feel valued. No one gave her a reason to stay or even offered a cuddle. And the sex didn't even come across as mind-blowing. Madison deserved better.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 11, 2025
O
Verified Purchase
Oregon BookWorm
Lowell, US
★★★★★ 5
No breakup, very sweet, instalove
Format: Kindle
Omegaverse and doesn't disappoint! Sweet guys, newly Omega FMC. The boyfriends are boyfriends. What's not to love? No angst, no breakup.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 23, 2025
F
Verified Purchase
ForTheLOVEofBooks
Port Orchard, US
★★★★★ 4
Pretty Darn Good
Format: Kindle
So I’ve been on a omega kick and this definitely hit the spot. Madison was frustrating at times with how she acted towards Lucas, Gray, and Rian. It was like she said towards the end, she didn’t believe she deserved nice things. It would have been nice to hear from her best friends again. They kind of were there in the beginning and the gone except for mention of text messages received from them. I feel like her friends would have been great help in encouraging Madison to go with the pack and never give Brent another chance because he was toxic. I loved Rian. His personality was awesome. His humor. His ability to make Madison comfortable whenever she was feeling overwhelmed. And the fact he fell for her and she fell for him first. They are cute together. I do feel like Lucas was the odd man out though. Like Lucas didn’t develop as much of a relationship with Madison. I would have really liked to see more development in the relationship between them. It was also the same with him and Rian. There is really no relationship displayed. Most of the relationship being displayed is between Rian and Gray. Nevertheless, I loved reading about the dynamic that came to fruition during the entirety of this story. Madison finally got her happiness. And Brent finally got punched in the face. Everyone got exactly what they deserve.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 6, 2022
E
Verified Purchase
ediebegonia
Bozeman, 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
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 5, 2023

recommand products