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What's that sound? Exhaust slapping.

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Old May 30, 2016 | 07:48 AM
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casias
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Default What's that sound? Exhaust slapping.
Please help. I have a 6.0 LY6 truck engine with LS9 cam in a Dodge Dakota. Exhaust is stock cast manifolds with 2.5 tubing and 2.5 Magnaflow mufflers ending with turndowns just ahead of the rear axle.

The tubing only has one 45 degree bend on each side, about 18" straight pipe into the muffler.

What causes exhaust slapping? It gets louder at WOT. Any info would be appreciated?

Video:

https://www.youtube.com/watch?v=fnaO...ature=youtu.be
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Old Jun 1, 2016 | 09:43 PM
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Is ur exhaust hittin the floor pan?
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Old Jun 2, 2016 | 02:46 AM
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Originally Posted by xdanny510x
Is ur exhaust hittin the floor pan?
No. Plenty of room all the way around and secured with HD hangers.
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