Insane Shafts Intermediate Shaft for B Series

Insane Shafts B Series Manual Transmission Intermediate Shaft

You swapped a B series into your Civic or you're building a high-horsepower Integra and you've already upgraded to Insane Shafts axles because the stock axles can't handle the power, but you're still running the stock intermediate shaft? The intermediate shaft's the hollow steel shaft that connects the transmission to the passenger-side axle. The stock intermediate shaft's designed for a stock car making 170 hp. It's not designed for a turbocharged B series making 400+ whp. The stock shaft flexes under load. It can bend. It can snap. We've seen it happen. Insane Shafts' B series intermediate shaft replaces the stock hollow shaft with a solid chromoly steel shaft rated for 500 hp. Same material as their axles. Same 18-month warranty. This is what you install when you've upgraded the axles and you're done having the intermediate shaft be the weak point in your drivetrain.

Here's Why the Stock Intermediate Shaft Fails

The stock intermediate shaft is hollow steel. It's designed to be lightweight and it's designed for stock power levels. When you're making 300-500 whp and you're launching hard or pulling through the gears under boost, the stock shaft's flexing. You can't see it but it's happening. The shaft's twisting under load. Eventually it yields or it snaps. We've seen stock intermediate shafts bend on high-horsepower builds. We've seen them snap on drag cars. When the intermediate shaft fails, you're done. The passenger-side axle's not connected to the transmission anymore. You're stuck. Insane Shafts' intermediate shaft is solid chromoly steel. It's not hollow. It can't flex the way the stock shaft does. It's rated for 500 hp which is way more than the stock shaft can handle. If you're making enough power to break axles, you're making enough power to break the intermediate shaft. Upgrade both at the same time.

Chromoly Steel - Same Material as Insane Shafts Axles

Insane Shafts builds this intermediate shaft from chromoly steel. That's the same material they use for their axles. Chromoly's stronger than the mild steel Honda uses in the stock intermediate shaft. It's got higher tensile strength and higher yield strength. That means it takes more force to bend it and more force to break it. The shaft's solid, not hollow. Solid shafts are way stiffer than hollow shafts. They don't flex under load. You're putting power down and the intermediate shaft's transferring that power from the transmission to the axle without twisting or bending. That's what you want when you're making serious power. The stock shaft's fine for a stock car. It's garbage for a built motor or a turbo setup making real power.

Fits Stock B Series Cars and B Series Swaps

Insane Shafts designed this intermediate shaft to fit both stock B series cars (Integra, del Sol VTEC) and B series swaps (B series into Civic or CRX). If you're running a stock Integra with a B series and you're building the motor, this shaft fits. If you swapped a B series into your Civic and you're running Hasport mounts, this shaft fits. The fitment's the same. The intermediate shaft mounts to the engine block on one end and connects to the passenger-side axle on the other end. Insane Shafts matched the OEM dimensions so it's a direct bolt-in. You're pulling the stock intermediate shaft and bolting this one in. No modifications. No custom brackets. It just fits.

18-Month Warranty - Same as Insane Shafts Axles

Insane Shafts backs this intermediate shaft with an 18-month warranty. That's the same warranty they offer on their axles. If the shaft fails, they replace it. That's how confident they are that this shaft's not going to break. The warranty covers defects in materials and workmanship. It doesn't cover abuse or racing damage but it does cover normal high-performance use. If you're running the car hard on the street or at track days and the shaft fails, you're covered. Most intermediate shafts don't come with any warranty. Insane Shafts is one of the few companies that'll actually back their product.

What You Get

• Insane Shafts B series manual transmission intermediate shaft
• Solid chromoly steel construction (not hollow like stock)
• 500 hp rating (matches Insane Shafts axle rating)
• Direct bolt-in replacement for stock intermediate shaft
• Fits stock B series cars (Integra, del Sol VTEC)
• Fits B series swaps (B series into Civic, CRX)
• 18-month warranty
• Made by Insane Shafts

Fits These Setups

• 1994-2001 Acura Integra (GS, LS, RS, GS-R, Type R - all B series engines)
• 1993-1997 Honda del Sol VTEC (B16A3)
• 1999-2000 Honda Civic Si (B16A2)
• 1992-2000 Honda Civic with B series swap
• 1988-1991 Honda CRX with B series swap

Note: Manual transmission only (intermediate shaft connects transmission to passenger-side axle). Solid chromoly steel construction (not hollow like stock - can't flex or bend under load). 500 hp rating matches Insane Shafts axle rating. Stock intermediate shaft is hollow mild steel designed for stock power - flexes and fails at 300-500 whp. Direct bolt-in replacement for stock intermediate shaft (no modifications required). Fits stock B series cars (Integra, del Sol VTEC) and B series swaps (Civic, CRX). 18-month warranty covers defects in materials and workmanship. If you're upgrading to Insane Shafts axles, upgrade the intermediate shaft at the same time (don't leave the stock shaft as the weak point). Made by Insane Shafts.