DC Sports K Swap 4-2-1 Header - EG/EK Civic / DC Integra

Looking to drop a K-series into your EG or EK Civic or DC Integra and need a header that actually fits without custom fabrication? The stock manifold's not going anywhere and the K-swap headers out there either don't fit right or they're garbage. DC Sports engineered this header specifically for K swaps in these chassis. 4-2-1 equal length layout. 304 stainless throughout. CNC machined flanges that match the PRC Type R port shape perfect. Mandrel bent runners. TIG welded inside and out. You're getting better exhaust scavenging. You're getting lower backpressure. You're getting real power gains without all the installation headaches that normally come with K swaps. Available in polished stainless or ceramic coated. The ceramic coating reduces under hood temperatures so everything stays cooler during hard driving. Just bolt it on and route your exhaust. No custom work. No surprises.

Here's Why Stock Manifolds Choke K Swaps

You're bolting a K-series into an older Honda chassis and the stock manifold on that car was engineered for the original engine. The ports don't line up right. The tuning's wrong. The K-series is fighting backpressure the whole time. You're making less power than the motor's capable of because the manifold won't get out of its own way. A proper K-swap header with equal length runners fixes that. Both exhaust banks flow separate and merge clean. The tuning's right for the K-series firing order. Exhaust scavenging improves. The engine makes real power.

Ceramic Coated Or Polished Stainless - Pick What You Want

You've got two finishes. The polished stainless looks clean and it fights corrosion. The ceramic coated header does all that and it adds thermal protection. Ceramic coating's rated to 1200°F and it's applied inside and out. The coating reduces radiant heat so the heat stays in the exhaust where it belongs instead of cooking your engine bay. You're cramming everything tight in an EG or EK or DC and the engine bay gets hot. Ceramic coating helps keep it down. The intake temps stay lower. The plastic bits around the engine don't get beat up as bad from radiant heat. We've seen people run ceramic on swap builds because it makes a real difference in how much cooler the bay stays. Street driving. Polished stainless is fine. Track days or summer heat. Ceramic's worth the extra cost.

Built Right - Not Some Cheap Knockoff

This header is full 304 stainless steel. The flange is CNC machined from a half inch plate and precision machined down to 3/8 inch in the low stress areas to save weight without losing strength. Every weld is TIG welded inside and out for maximum strength. The primary runners are mandrel bent so they maintain shape and don't collapse. Each runner is flared to match the PRC Type R port shape exactly. The 2.5 inch outlet bolts to your exhaust clean. We've seen people buy cheap K-swap headers and they crack at the welds after a year of heat cycling. The runners collapse because they're not mandrel bent. The fitment's wrong so you're hammering subframes and running custom pipes. Don't do that. The DC Sports header is built solid.

Engineered For Real K Swap Fitment - No Custom Fabrication

The outlet's positioned where it won't hit your shifter or cables. The clearance works for lowered cars. The header comes with two O2 sensor bungs so you can run factory primary and secondary sensors or you can plug one and use it for a wideband at the dyno. A lot of cheap headers put the O2 sensor in a position that rubs the floorpan and that's a nightmare. This one's thought through. Everything's accounted for. The 2.5 inch flex bellow between the header and collector absorbs engine movement so the welds don't crack. You're not going to be chasing exhaust leaks six months later because everything moves around. Bolt it on. Route your exhaust. Done.

Equal Length Runners - Real Power Across The Board

The 4-2-1 layout with equal length runners is engineered to match the K-series firing order. Cylinders 1-4 and 2-3 pair together. The spacing is consistent so exhaust from one cylinder reaches the next at the right time during overlap. Scavenging improves. You're getting better power across the entire rev range not just at redline. The runner sizing steps from 48mm up to 50.8mm then merges into 54mm secondaries. The transition into the 63.5mm collector is calculated so velocity stays high and flow is smooth. We've seen people put this header on a K-swap and immediately notice the difference. The engine responds quicker. The power's there all the way up.

What You Get

DC Sports K-swap 4-2-1 header
Fits 1992-2000 Honda Civic EG/EK with K20A, K20Z, K24A swap
Fits 1994-2001 Acura Integra DC with K20A, K20Z, K24A swap
304 stainless steel throughout
CNC machined flanges
Mandrel bent equal length runners
Polished stainless or ceramic coated finish
2.5 inch outlet with flex bellow
Two O2 sensor bungs included
TIG welded construction
Hasport and Innovative mount compatible

Fits These Cars

1992-2000 Honda Civic EG/EK (K20A, K20Z, K24A swap)
1994-2001 Acura Integra DC (K20A, K20Z, K24A swap)

Note: DC Sports K-swap 4-2-1 header for EG/EK Civic and DC Integra with K20A, K20Z, K24A engine swaps. 304 stainless steel construction with CNC machined flanges. Equal length mandrel bent primary runners (48mm stepping to 50.8mm, merging into 54mm secondaries, transitioning to 63.5mm 2.5-inch collector). TIG welded inside and out. Available in polished stainless finish or ceramic coated finish (ceramic coating rated 1200°F, reduces radiant under hood heat). 2.5 inch outlet with stainless flex bellow. Two O2 sensor bungs positioned to clear chassis and wiring. Compatible with Hasport mounts (two height positions) and Innovative mounts (most forward configuration). No cutting or custom fabrication required. Direct bolt-on installation. Improves exhaust scavenging and reduces backpressure. Real horsepower and torque gains across entire rev range. Better throttle response. Cleaner exhaust flow. One header per order.

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