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Old 10-25-2015, 05:11 PM   #1
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Rattle

Need yalls opinion on a rattle I went and had the car put on a lift sounded like a rod knock but only with light acceleration between 1500 and 2000 rpms took a long screwdriver listened to both sides of the block all sounded normal no knock in the block placed the screwdriver on the drivers cat heard the knock there on the passenger side cat it sounds free flowing so can a bad cat rattle I plan on next Sunday removing the front cats put up a video for you guys to hear thanks


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Old 10-25-2015, 10:19 PM   #2
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Yes. I had one break on my truck and it sounded very similar to that. The damned truck kinda sounded like a diesel at idle! Lol
What happens is, the ceramic honeycomb, that is inside the cat, breaks apart and the pieces rattle around from the exhaust turbulence. Some of the broken pieces may end up in your muffler also, like mine did.
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Old 10-25-2015, 11:33 PM   #3
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Cool thanks stray


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Old 10-26-2015, 06:35 AM   #4
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Down pipes from manifold on passenger side only needs a gasket replaced anytime its disconnected, FYI.

Also,- There are many hi-flow cats to choose from. I purchased a 2.5" THUNDERBOLT cat, 11.5" long. FYI
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