What This Bellows Actually Does
This is a 23-inch flex pipe section, heavy-duty grade, meant for the VNL exhaust routing where the pipe has to flex with cab movement, engine torque, and road vibration without splitting. Rigid pipe alone can't handle that movement over time - it work-hardens and cracks. The bellows takes that motion so the rest of your exhaust doesn't have to.
It's listed as universal fit for the 2009-2010 VNL, which means Volvo used this same bellows length and diameter across multiple exhaust configurations that model year, not just one specific chassis setup. Doesn't mean it bolts to everything - means the physical dimensions matched across several builds.
When these fail you'll usually hear it before you see it - a rattling or hissing noise around the flex section, sometimes exhaust smell in the cab if it's split bad enough. Visually you're looking for cracked braid, rust-through at the corrugations, or a section that's gone soft and floppy where it should hold shape.
Reading the Cross-Reference Numbers
23789373 is the Volvo number. 23789373KTP is Volvo's kit version - same bellows, packaged with whatever clamps or hardware they bundle for the service kit. PN-3-B-034 and 22563153 are aftermarket cross-references that manufacturers assign when they've engineered a piece to the same length, diameter, and flex spec as the Volvo original.
The thing to watch on any flex pipe cross is inlet/outlet diameter and overall length - a bellows that's a half inch off in diameter won't seal right no matter how good the clamps are, and one that's too short or long throws off your whole exhaust alignment back to the muffler or DPF. Braid density and wall thickness matter too on the heavy-duty versions, since that's what determines how many years of flex cycles it survives before it fatigues.
None of these numbers guarantee a fit sight unseen. Pull your old bellows and check the number stamped or tagged on it, or get your VIN, before you order. Exhaust routing changed enough within the same model years that we've seen two trucks a year apart need different lengths.
Ordering From PartStop
We keep this one in stock in Tacoma and it goes out same-day if you order before cutoff. Ship nationwide too if you're not local - doesn't matter if you're running out of a yard in Fife or a terminal in Ohio.
Comes with our standard 6+ month warranty. If it doesn't match up once you get it next to the old part, call us before you cut anything or clamp it in - easier to sort a return before it's been welded or trimmed to fit.
Have your VIN or the old part number ready when you call. Counter guys can move faster with that in hand than guessing off a truck description.
23789373 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to 23789373. 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 |
|---|---|
| Cross-Reference | PN-3-B-034, 22563153 |
| Volvo | 23789373KTP |
Frequently asked questions
Does 23789373 fit my 2010 VNL?
Likely, since it's listed for 2009-2010 VNL, but pull the number off your old bellows or have your VIN ready before you order - exhaust routing wasn't identical across every VNL config that year.
Is 22563153 the same as the Volvo 23789373?
22563153 is an aftermarket cross-reference built to the same length and diameter spec as the 23789373. It's not a Volvo part, but it's manufactured to interchange with it - confirm your old bellows' dimensions match before installing.
What's the difference between 23789373 and 23789373KTP?
Same bellows section - the KTP is Volvo's kit number, meaning it comes packaged with additional clamps or hardware. If you just need the pipe and already have good clamps, the base number is what you want.
Not sure it fits? We check before you pay.
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
Need the part, not just the reading?
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.