Skunk2 Alpha K Swap Header

Skunk2 Alpha Series K-Swap Header - EG/EK Civic & DC Integra (K20/K24)

Back in stock after a long wait. If you've been holding out for the Skunk2 Alpha K-swap header, this is it. It brings Skunk2's race header design down to a price normal people can pay, and on a K-swapped EG, EK, or DC it clears out the biggest restriction left on the engine. Equal-length stepped primaries, a 4-2-1 Tri-Y layout, and a 2.5-inch collector, all in T-304 stainless.

It Fits Without Cutting Your Cross-Member

This is the reason to buy this header over the alternatives, and anyone who's fought a K-swap header install already knows why it matters. Plenty of competitors' headers require you to cut or modify the front cross-member to clear. Skunk2's doesn't. It's engineered to fit as-is, and it's compatible with most swaps running Hasport engine mounts or comparable kits, on both K20 and K24 setups. That's one less irreversible modification to your chassis and one less afternoon lost to fabrication.

Why Smaller Primaries Make More Usable Power

Here's what separates an engineered header from a big pipe. It's tempting to think bigger tubes always flow better, but exhaust doesn't work that way. Oversize the primaries and gas speed drops, and when velocity falls off you lose the scavenging that pulls spent gas out of the cylinder. You end up with a header that posts a slightly bigger peak number and feels worse everywhere you actually drive.

Skunk2 went the other direction, using the smallest primary tubes that still achieve optimum overall and peak power. That keeps exhaust gas speed high through the whole header, which you feel as stronger midrange and noticeably sharper throttle response without giving up the top end. The stepped primaries let the tubing grow as gas expands, and the equal-length sequential pairing means each cylinder's pulses reach the collector properly timed instead of fighting each other.

Built From The MegaPower Playbook

None of this is guesswork. The Alpha Series is patterned after Skunk2's MegaPower headers, the ones competitive race teams have run for years, and the design came out of more than a decade of racing combined with computerized modeling and a lot of dyno time. Skunk2 has been building custom headers for their own drag, road race, and endurance cars for years. This is that same thinking in a production part.

What's In The Box, And What Isn't

Read this before you order so you're not stuck mid-install. Included:

• The header
• A weldable flange for your exhaust
• A new donut gasket

Not included:

• Mounting hardware
• Exhaust manifold gasket

So plan on sourcing your manifold gasket and hardware separately, and note that the exhaust-side flange is weldable, meaning you or your shop will need to weld it to your exhaust rather than bolting it up. Worth knowing before the header shows up.

Fits K20 And K24 Swaps

This header covers K-series swaps across the golden era chassis:

Works with both K20 and K24 swaps, and with most Hasport or comparable mount kits.

This Is A Race Header

Being straight about it. The design eliminates the catalytic converter, which is how it flows the way it does, and that makes this a race application. It won't pass emissions testing. If your car is a track build, a race car, or an off-road-use project, this is a lot of header for the money. There's an O2 sensor bung with M18 x 1.5 thread pitch, so your sensor goes where it should.

Who Should Run This Header

This is for the K-swap builder who's done the intake and the exhaust and knows the manifold is what's left. You want race-header design from a company that actually races, you want it to fit without taking a saw to your cross-member, and you want the midrange to stay strong instead of trading it for a peak number. Get your gasket and hardware sorted, weld up your flange, and go use it.

Fits: K20 and K24 swaps into the 1988-2000 Honda Civic (EF, EG, EK) and 1990-2001 Acura Integra (DA, DC). Design: equal-length sequentially paired stepped primaries, 4-2-1 Tri-Y, 2.5" collector. Material: T-304 stainless steel with a thin-wall cast collector. Fitment: no front cross-member modification required, compatible with most Hasport and comparable mount kits. Includes: weldable exhaust flange and donut gasket. Not included: mounting hardware or exhaust manifold gasket. O2 bung: M18 x 1.5. Application: race use, eliminates the catalytic converter.