Driveshaft Shop X4 700 HP K Swap Axles for Civic/Integra

Driveshaft Shop X4 700HP Axle Set - K-Swapped EG, EK & DC

This is the axle for a fast street car that still shows up at the track. Driveshaft Shop's X4 line is built from 300M with their best heat treat processes, rated to handle 700 to 1000 wheel horsepower depending on application, and it's a direct bolt-in rather than something you're modifying to fit. If you've outgrown budget axles and you're putting real power through the front wheels, this is the tier that stops being the weak link.

Which Subframe Are You Running?

This determines which set you need.

EG or DC subframe with EKK2 mounts: 510081 / 510084
Stock EK subframe with EKK1 mounts: 510083 / 510086

Your mounts decide where the drivetrain sits, and that position determines axle length and working angle. The two layouts put the powertrain in different places, so the axles aren't interchangeable.

Both versions require a K20 RSX or EP3 Civic Si intermediate shaft. Substituting a different one creates length and plunge problems that won't show up until the suspension moves.

300M Is Why It Holds

The material is the reason for the rating, and it's a genuinely different tier from what most axles use.

300M is a high-strength alloy used where failure isn't an acceptable outcome. Combined with Driveshaft Shop's heat treat processes, it's what lets these handle the torque and shock loading that destroys ordinary axles on a hard launch.

Axles typically fail in torsion rather than bending, so material strength through the bar is what determines whether one survives a sticky tire and a built engine. That's where the 700 to 1000 wheel horsepower range comes from.

Built For Cars That Do Both

Worth understanding the positioning, because it's specific.

Driveshaft Shop engineered the X4 line for fast street cars that visit the track for drag, road course, and autocross duty. That's a real category and it's a demanding one, since the axle sees daily driving loads, launch shock, and sustained cornering load all in the same week.

If your car is a dedicated drag car chasing four-digit power and nothing else, their higher tiers exist for that. If your car is genuinely fast and genuinely driven, this is the range it belongs in.

Fits 26 Or 28 Spline Hubs

Useful flexibility. These work with factory Honda and Acura 26-spline hubs, and also with the 28-spline hubs offered by aftermarket manufacturers.

That means you're not locked into one path. Run factory hubs now, upgrade later, and the axles carry over rather than becoming another thing to replace when you step up.

One Year Warranty

Worth calling out because it separates this tier from the budget end. Driveshaft Shop backs the X4 line with a one year warranty, which is a meaningful statement on a part that lives under a car being launched hard.

Check Your Range Of Motion After Install

The step people skip, and the one that saves an axle.

Once fitted, cycle the suspension through full travel and turn to full lock both directions. You're checking that the inner joint isn't bottoming out at compression or over-extending at droop, and that everything clears through the steering range.

A swapped car's geometry isn't what the factory intended, so this verification matters more than it would on a stock chassis. Finding a problem in the garage costs an afternoon. Finding it on a pass costs considerably more.

Fitment

1992-2000 Honda Civic (EG / EK)
1994-2001 Acura Integra (DC)

K-series swapped with EGK, V1 EGKLEAN2, EKK1, or EKK2 mounts. Select your subframe and mount configuration at checkout.

EG / DC subframe, EKK2 mounts: 510081 / 510084
Stock EK subframe, EKK1 mounts: 510083 / 510086

Requires a K20 RSX or EP3 Civic Si intermediate shaft. Works with 26-spline or 28-spline wheel hubs.

Who Should Run These

This is for the K-swap builder whose car is genuinely fast and still gets driven, and who's decided axles shouldn't be what limits it. Real power on the street, track days on the weekend, and a set of axles that won't be the thing that ends your day. Confirm your subframe and mounts, sort your intermediate shaft, and check your travel before you lean on it.

Fits: K-swapped Honda Civic EG and EK, and Acura Integra DC. Part numbers: 510081 / 510084 (EG or DC subframe with EKK2 mounts), 510083 / 510086 (stock EK subframe with EKK1 mounts). Rating: 700 to 1000 wheel horsepower depending on application. Material: 300M with Driveshaft Shop heat treat. Hubs: compatible with 26-spline or 28-spline. Required: K20 RSX or EP3 Civic Si intermediate shaft. Warranty: 1 year.