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"Factory performance parts" that do not void the bumper to bumper or power train warranty are non existent.
The FRPP parts carry their own warranty, but Ford considers them aftermarket.
The GMP stuff straight up kills your warranty and is more expensive
The Scat Packs past stage 1 are "off road only" and now 2 years out from the announcement only Stage 1 has dropped.
Manufacturers don't want you to mess with their creation. They have company paid hacks that go into enthusiast forums and are paid to say that cold air intakes, headers, exhaust, and tunes don't really make any more power and that they actually compromise what has taken years to perfect. They cannot tell you that their tunes are extremely conservative and do not make ideal power because that would be seen as encouraging aftermarket meddling with their product.
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