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Techtonics Tuning - B5 Audi S4 00-02, 2.5 inch Turbo Downpipes w/ High Flow cats

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This is a Race-only product. By adding this product to your shopping cart, you are electronically acknowledging that this product is not to be installed on any registered vehicle that will be driven on any US road, street or highway. In addition, you also acknowledge that the use or installation of this product outside of the intended closed circuit racing purpose may be illegal under the Federal Clean Air Act (42 U.S.C. § 7522(A)(3))

To purchase this product, you must fill out and e-mail the form at the link below to We cannot ship this product to you without a completed form.

Track Car Modification Waiver Form


B5 Audi S4 up to 2002 2.7T, 2.5 inch Turbo Downpipes with High Flow cats (Manual trans only) Select between full 2.5" for use with the Techtonics exhaust, or reduced to 55mm to fit to the stock or stock connection sized exhaust.

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