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The BBK Vari-Tune cat-back for 1986–2004 Mustang GT, LX and Cobra models replaces the factory system with a direct bolt-on aluminized steel kit and brushed stainless tips. Each Vari-Tune muffler has an adjustable stainless power valve that you set with a wrench and lock in place, letting you tune sound and flow. BBK states typical gains of 8–10 dB and about 10–15 hp depending on setup.
BBK 86-04 Mustang Cat Back Kit Varitune Mufflers Stainless Steel Tips
