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For example, car manufacturers must still honor warranties if you modify your exhaust system but begin to have trouble with your transmissions. But, if your cat's back exhaust system directly or indirectly causes damages to other areas of your car, car manufacturers may have the right to refuse warranties.

No, they won't void a warranty unless it proves to cause a failure. Catted or catless, it doesn't matter.

Just having headers or any aftermarket part on the vehicle does not void your warranty. They also can't void your entire powertrain warranty simply due to the addition of aftermarket parts.

Which Mods Will Void Your Warranty and Which Are Safe? Be Careful.. YouTube Start of suggested clip End of suggested clip Converters. Because uh your cat-back exhaust comes after uh really the engine. And after the cats aMoreConverters. Because uh your cat-back exhaust comes after uh really the engine. And after the cats a lot of times if something goes wrong with your cats the the uh the manufacturer. Or the dealership.

Catbacks are absolutely 100% nothing to be worried about though, they're past every sensor and the engine doesn't care at all what's going on back there. A catback exhaust will not void your warranty.

For example, car manufacturers must still honor warranties if you modify your exhaust system but begin to have trouble with your transmissions. But, if your cat's back exhaust system directly or indirectly causes damages to other areas of your car, car manufacturers may have the right to refuse warranties.

Long tube headers, high-flow cats and aftermarket exhaust will only void your warranty on your headers, cats, and exhaust system. Obviously, if you get this stuff installed and there's an exhaust leak, and you take it to the dealership, they will not cover it under warranty.