The downpipe connects the turbo outlet to the rest of the exhaust, and a cracked one or failed gasket causes exhaust leaks, noise, and heat where you do not want it.
What it does
Right after the turbine, the downpipe carries hot exhaust into the exhaust system. It endures extreme heat and vibration, so its flange gaskets and the pipe itself can crack or leak over time, especially at the bolted connections.
Signs it is failing
- An exhaust tick or roar near the turbo
- Exhaust smell and heat in the engine bay
- Soot around the downpipe flange
- Loose or broken flange bolts
Replacement and what to know
A cracked downpipe or failed gasket is replaced with quality parts and correct hardware, since the area runs hot and vibrates. Inspect the turbo outlet and surrounding exhaust connections at the same time.
Frequently asked questions
What does a downpipe do?
It carries hot exhaust from the turbo outlet into the rest of the exhaust system.
What are signs of a downpipe leak?
An exhaust tick or roar near the turbo, exhaust smell and heat in the bay, and soot at the flange.
Why does it crack?
Extreme heat and vibration stress the pipe and its flange bolts, especially at the connections.
Need the part?
We stock the parts these trucks need. Shop our diesel parts catalog →