Pros and Cons of Exhaust Dumping After the Axle

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1

I asked this question on another forum but did not get any responses, so I’ll try here:

I am thinking about replacing my muffler but keeping the resonator and having the exhaust exit after the axle. I only want an exhaust tip to direct gases away from the truck. For clearance and appearance, I prefer not to have exhaust tips out the back or sides.

So, with a 45-degree turn-down (down and away on the passenger side) after the axle, what are the real risks of corrosion or CO buildup at idle? I hope the 45-degree angle will reduce drones, but my main concern is safety. If I idle for an hour, is there a risk of CO buildup? I rarely do this, but I like to be prepared for the worst-case scenario. I have considered installing a CO monitor just in case.

Thanks for any advice.

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That’s what I did with my last pickup and plan to do with my current one. It looks great and has no downsides in my opinion.

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3

I had them dumped in front of the axle on my Mustang, and the drone was faulty. Additionally, driving down a gravel or dirt road will kick up a dust storm.

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I’ve spent a lot of time working on cars and understanding vehicle modifications. For your exhaust setup with a 45-degree turn-down, the main risk is CO buildup, especially when idling for long periods.

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While the angle can help reduce drone and direct gases away, safety is a priority. Corrosion risk is manageable with quality materials, but CO buildup can be dangerous. Installing a CO monitor is a smart precaution to ensure you stay safe, particularly if you find yourself idling often.