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Invidia Catback Owners - Durability Issues

I bought an Invidia Gemini system brand new from a vendor on Facebook a few years ago, currently has MAYBE 25,0000 miles on it, and its developed a metallic rattle/volume

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Old 10-22-2020, 02:29 PM   #1 (permalink)
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Default Invidia Catback Owners - Durability Issues

I bought an Invidia Gemini system brand new from a vendor on Facebook a few years ago, currently has MAYBE 25,0000 miles on it, and its developed a metallic rattle/volume increase (think "BLAT" type sound) in midrange RPM under heavy throttle input.

Exhaust was completely fine until a recent drive to CO Springs, where on arrival it developed this characteristic. Took it to a shop to check for leaks and nothing was found so I'm wondering if the excess heat from 8+ hours of driving ended up hurting the resonators or mufflers. No rattles found when poking at it on a lift either.

Anyone else with an Invidia run into this issue? Current set up includes Stillen G3 and test pipes.
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Old 10-22-2020, 03:58 PM   #2 (permalink)
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Since it’s a straight-through exhaust, there are no baffles so that’s not it. But it could be that some of the perforated material in the resonators or mufflers broke off. But, if I had to take a guess I’d bet it’s one of the external welds (hangers, reinforcement, etc.) that cracked. This happens to a lot of aftermarket exhausts.
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Old 10-22-2020, 04:30 PM   #3 (permalink)
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This past summer. I had the tack welds that hold the perforated metal break inside on one of my FI tips. I couldn't hear it inside the car. My wife herd it when I started the car up and backed out of the garage. I took my mig gun and put some new tacks on it.
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Old 10-23-2020, 12:08 AM   #4 (permalink)
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Originally Posted by Cyber370 View Post
Since itís a straight-through exhaust, there are no baffles so thatís not it. But it could be that some of the perforated material in the resonators or mufflers broke off. But, if I had to take a guess Iíd bet itís one of the external welds (hangers, reinforcement, etc.) that cracked. This happens to a lot of aftermarket exhausts.
Iím thinking something cracked or tore in the perforated section, because when under the car knocking around on resonators or mufflers we couldnít find a rattle and nothing sounded loose. Hangers looked fine, plus this is an exhaust sound characteristic, not just a buzz/rattle. I canít be the only Invidia owner with this issue so I figured Iíd fish
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