The GM Performance exhaust is baffled if I remember correctly which would give you little to no performance gains. Aftermarket stuff will NOT void your warranty as long as that specific part does not cause the defect. For example, if you were to install a nice Magnaflow or Corsa exhaust and you had to take it to the dealer for an unrelated problem, it is against the law for the dealer to deny your warranty.
VEHICLE WARRANTY DENIAL & THE LAW
Some motor vehicle dealers and manufacturers are telling customers that the factory warranty on their motor vehicles is "void," if aftermarket parts or accessories are installed on their vehicles. This is incorrect. DONMAR would like to refer you to the federal Consumer Product Warranties law, under the Magnuson-Moss Warranty Act, which states, in part, in Title 15, United States Code, Section 2302, subdivision (c) that:
"No warrantor of a consumer product may condition his written or implied warranty of such product on the consumer's using, in connection with such product, any article or service (other than article or service provided without charge under the terms of the warranty) which is identified by brand, trade, or corporate name; except that the prohibition of this subsection may be waived by the [Federal Trade] Commission if –
the warrantor satisfies the Commission that the warranted product will function properly only if the article or service so identified is used in connection with the warranted product, and
the Commission finds that such a waiver is in the public interest. The Commission shall identify in the Federal Register, and permit public comment on, all applications for waiver of the prohibition of this subsection, and shall publish in the Federal Register its disposition of any such application, including the reasons therefor."
Under this federal statute, a manufacturer, who issues a warranty on your motor vehicle, is prohibited from requiring you to use a particular brand of product, unless such item is provided, free of charge, under your warranty or unless the Federal Trade Commission (FTC) waives this prohibition against the manufacturer. DONMAR is unaware of any exemption or waiver granted by the FTC to any motor vehicle manufacturer, which pertains to parts, accessories or styling products.
DONMAR considers any claim to void your factory warranty, or the actual voiding of your factory warranty, solely for the installation of a DONMAR product or other aftermarket accessory, to be a violation of federal law. We reccomend that you ask your dealer to provide a written record of the warranty denial, including specific reasons, if warranty is denied under the following circumstances:
A motor vehicle dealer fails to provide warranty coverage on an unrelated factory part, and refuses to "demonstrate" [as federal law requires] that an installed aftermarket product caused the failure for which warranty coverage has been denied.
A motor vehicle a manufacturer refuses to honor, authorize or cover warranty repairs on your vehicle, merely because you have an aftermarket product installed.
A motor vehicle dealer or representative of the motor vehicle manufacturer advises you, prior to your purchase, that the installation of aftermarket parts or accessories will void your vehicle warranty.
The Specialty Equipment Market Association (SEMA) monitors problems associated with warranty claims to ensure that vehicle dealers are not misrepresenting the law. If you believe legitimate factory warranty coverage has been unfairly denied due to presence or installation of aftermarket parts or accessories, contact SEMA online at
www.sema.org, or call 909/396-0289. SEMA will contact the dealership and manufacturer to advise them of the law and request that they clarify their position relative to the installed aftermarket parts or accessories.
In addition to any informal action SEMA may take, you should consult an attorney and various state and federal agencies, who may be able to assist you in protecting and enforcing your warranty rights, if you encounter a motor vehicle dealer’s or manufacturer’s refusal to honor your motor vehicle warranty.
If the failure to honor a warranty claim involves the new vehicle warranty, and it appears that the dealer improperly denied the claim, file a complaint with the Federal Trade Commission (FTC) online at
www.ftc.gov, or call 202/326-3128.
****This info came from
http://www.donmar.com/ConsumerBillofRights.htm ****