PRODUCT DETAILS
Driveshaft Shop X4 700HP Axle Set - B-Series Hydro (510082 / 510085)
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 on factory 26-spline hubs. If you've outgrown budget axles but don't need a full hub kit, this is the tier that stops axles being the weak link.
Factory 26-Spline Hubs Required
Quick check before you order, and it's the only fitment gate on this set.
These are designed around factory 26-spline wheel hubs. That's what came on the GS-R, LS, and Type R Integra, and on the B-series Civics and Del Sols this fits.
If you've already converted to aftermarket 28-spline hubs, this isn't the set for you. And that's actually the appeal for everyone else: you keep your existing hubs, so you're buying axles rather than an entire hub and axle package.
300M Is Why It Holds
The material is the reason for the rating, and it's a genuinely different tier from what ordinary 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 lesser 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 demanding category, 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 build chasing four-digit power, the 1000HP axle and hub kit is the tier for that. If your B-series is genuinely fast and genuinely driven, this is where it belongs.
Where This Sits In The Range
Three tiers, and the choice comes down to power and hubs.
Level 0 is stock replacement and basic swaps. No horsepower rating, no warranty against breakage, and the right call for a car that isn't making serious power.
X4 is this set. Real rating, one year warranty, bolts to your factory hubs. The step for a fast street and track car.
1000HP kit is the top, and it includes hubs because it requires its own. That's for the hardcore racer at 900 to 1000 wheel horsepower.
Most people building a quick B-series land here, and it's usually the right answer.
Non-Refundable After Installation
Worth stating clearly. Once installed these can't be returned, which is standard for driveline components at this level. Confirm your hubs before you order rather than after.
Check Your Range Of Motion After Install
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.
On a lowered or swapped car this matters more than it would on a stock chassis, since the geometry isn't what the factory intended.
Fitment
1992-2000 Honda Civic
1993-1997 Honda Del Sol
1994-2001 Acura Integra (GS-R, LS, Type R)
Hydraulic B-series drivetrain with factory 26-spline wheel hubs. Part number 510082 / 510085. Sold as a pair.
Who Should Run These
This is for the B-series owner 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 that won't be the thing that ends your day. Confirm your hubs are factory 26-spline, fit them, and check your travel before you lean on it.
Fits: 1992-2000 Honda Civic, 1993-1997 Honda Del Sol, and 1994-2001 Acura Integra with hydraulic B-series drivetrain and factory 26-spline wheel hubs. Part number: 510082 / 510085. Rating: 700 to 1000 wheel horsepower depending on application. Material: 300M bar and splined stub, chromoly CV housing. Includes: axle pair. Warranty: 1 year. Note: non-refundable after installation.
1994-2001 Acura Integra
1992-2000 Honda Civic
1993-1997 Honda Del Sol