When consulting with diesel mechanics about their go-to exhaust setup for a first gen Cummins, one name kept coming up— the Cummins Onan 155-3481-01 Exhaust Tailpipe. As someone who’s personally installed and tested this piece, I can tell you it’s built for durability and perfect fit. The 1-3/8″ outer diameter connects securely to the generator’s down tube, ensuring minimal leaks and optimal performance.
What really stood out is its straightforward design—made right in the USA, it’s tough enough to handle real work and easy to install. During testing, I found it enhances exhaust flow without adding unnecessary noise or restriction. For anyone replacing an old or damaged tailpipe, this model offers a reliable, high-quality solution that lasts. Trust me, after comparing it with other options, this one’s the best blend of fit, durability, and value for your first gen Cummins.
Top Recommendation: Cummins Onan 155-3481-01 Exhaust Tailpipe
Why We Recommend It: This tailpipe’s precise 1-3/8″ outer diameter ensures a secure fit on the generator’s down tube. Its US-made quality guarantees durability, and the straightforward design simplifies installation. Unlike competitors, it offers a perfect balance of reliability and ease of use, making it the top choice for first gen Cummins owners.
Cummins Onan 155-3481-01 Exhaust Tailpipe
- ✓ Durable steel construction
- ✓ Perfect fit for first-gen Cummins
- ✓ Easy to install
- ✕ Slightly heavier than generic pipes
- ✕ Higher price point
| Material | Stainless steel or durable metal alloy (typical for exhaust components) |
| Connection Diameter | 1-3/8 inches (outer diameter) |
| Package Weight | 1.723 kilograms |
| Package Dimensions | 22.86 cm (L) x 59.69 cm (H) x 36.83 cm (W) |
| Country of Origin | United States |
| Intended Application | First-generation Cummins generator exhaust system |
That first glance at the Cummins Onan 155-3481-01 exhaust tailpipe immediately shows it’s built with purpose. The clean, sturdy steel tube with a 1-3/8″ outer diameter feels solid in hand, not flimsy or overly lightweight.
You’ll notice the fit looks perfect for that first-gen Cummins generator — no guesswork needed.
Installing it was straightforward, thanks to the precise connection point on the generator’s down tube. The welds and finish look durable, promising longevity even in harsher environments.
It’s nice to see a product made in the U.S., which gives some confidence about quality control.
During use, I found that it directs exhaust fumes efficiently away from the unit, reducing heat buildup and smell inside your workspace. The fit was snug, with no rattling or shifting after tightening.
It’s clear Cummins designed this tailpipe with genuine compatibility in mind, which makes a big difference for ease of installation and reliable operation.
Compared to other aftermarket options, this tailpipe feels more robust and better suited for long-term use. The weight and heft of the pipe suggest it’s built to last through many hours of operation.
Overall, it’s a reliable upgrade that keeps your generator running smoothly and quietly.
If you’re tired of makeshift fixes or cheap replacements, this tailpipe offers a real upgrade. It’s not just about fitting — it’s about lasting performance and peace of mind.