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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.

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.

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.

2:36 8:13 Harley Can't Void Your Warranty For Aftermarket Parts Anymore! Or Can ... YouTube Start of suggested clip End of suggested clip So you can you can read through that but it says you may elect to use non-hd. Parts non-genuine hdMoreSo you can you can read through that but it says you may elect to use non-hd. Parts non-genuine hd parts and service providers not authorized by harley-davidson.

In 2017, Harley entered a consent decree, filed by the United States EPA, that required them to cease the sale of all non-compliant EFI tuners. And, void warranties on those Harley's with non-compliant EFI tuners.

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.

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.

They at most will void the warranty of the parts replaced and (possibly) any parts affected by them. The tune required of the Long tubes however will void the powertrain warranty. It however should not void the warranty on the top or any non powertrain items.