What This Clamp Does
The V-band clamp wraps two matching flanges — the turbocharger outlet and the exhaust pipe — and pulls them together as the band tightens. The V-profile draws the flanges axially instead of just squeezing them radially, which is what gives a high clamp load on a joint that sees full exhaust gas temperature and constant vibration.
This is an aftermarket 4 inch connection, with a clamp range of roughly 4-7/16 in to 4-5/8 in across the flange pair. The band is stainless steel so it holds tension through repeated heat cycles instead of relaxing and letting the joint weep. It is a direct replacement for 3896337.
On Class-8 applications this joint sits right off the turbo, so anything that leaks here is loud, hot, and sends soot onto the surrounding harness and heat shielding. It is also a common casualty of turbo replacement — the old clamp gets reused, the T-bolt is already stretched, and the joint never seals again.
Why These Numbers Cross
3896337 and 2880482 are both Cummins-side references for the same turbo outlet V-band on the ISX family. Cummins revised clamp part numbers across production runs and service kits, so a truck built one year and a service pack shipped another year can carry different numbers for a clamp with identical band diameter, V-profile angle, and T-bolt hardware.
24555940 and VB2013 are aftermarket numbers covering the same 4 inch V-band. VB-prefix numbers are a common aftermarket cataloging convention for V-band clamps sized by flange diameter. All four numbers land on a clamp with the same nominal flange size and the same clamp range, which is why they show up together in interchange listings.
Those numbers are listed for identification only. PartStop is not affiliated with, endorsed by, or authorized by any OEM. Use the cross-reference as a starting point, then confirm against the number stamped or tagged on the clamp you are pulling off, or against your engine serial number.
Check Before You Order
Measure the flange, not the pipe. A 4 inch V-band is sized on the flange outside diameter, and a 4 inch pipe with a different flange will not sit in the band correctly. Verify the flange pair falls inside the roughly 4-7/16 in to 4-5/8 in range before you commit to this clamp.
Pull the engine serial number and confirm you are on an ISX, ISX12, ISX15 or X15. Applications include Freightliner Cascadia, Columbia and Coronado, Kenworth T680, T800 and W900, Peterbilt 389 and 579, International ProStar and LT, and Western Star — but the engine build, not the chassis badge, decides the clamp.
3896337 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to 3896337. Use them to identify the part — then confirm the exact fit by VIN or the number stamped on your old unit before you order. An interchange is a starting point, not a fitment guarantee.
| Brand / Line | Cross-Reference Numbers |
|---|---|
| Aftermarket | 24555940, VB2013 |
| Cummins | 2880482 |
Frequently asked questions
Can I reuse the old V-band clamp when I replace the turbo?
Not recommended. The T-bolt stretches and the band loses spring tension after heat cycling, so a reused clamp often will not hold the flanges tight enough to seal. If the band shows heat discoloration, thread galling, or a bent nut retainer, replace it. A leaking turbo outlet joint will cost more in downtime than the clamp.
Is 2880482 the same clamp as 3896337?
They cross to the same 4 inch turbo outlet V-band on the Cummins ISX family and are commonly listed as interchangeable. Number changes across production and service runs are normal. Confirm by measuring your flange diameter and checking the number on the clamp you are removing before ordering.
How do I know if this joint is leaking?
Look for a black soot fan spreading from the clamp seam onto nearby shielding, hoses, or harness. You may also hear a sharp exhaust tick that changes with boost. Shut down, let it cool, and check whether the T-bolt has backed off or the band has spread before you condemn the turbo housing.
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Run your VIN and we’ll match parts to your exact truck, or call the counter — a person who knows trucks verifies fitment by OEM number before the order ships. No wrong-box returns.
More cross-reference guides
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Every part below is a Premium Quality aftermarket Direct Replacement with published OEM cross-reference numbers, a 6+ month warranty and same-business-day shipping from Tacoma, WA. Not sure it fits? Run your VIN — or call and a person who knows trucks will verify fitment before you pay.