Black Duck Stainless Steel exhausts are designed in Barcelona and made in Spain using state of the art materials and race-proven advanced techniques to maximize engine power and efficiency. Headers come with heat shields to reduce temperature in key areas by up to 50%. Mufflers feature permanently mounted dB-killers. For track use, these components can still be removed, but doing so requires permanent alterations to the exhaust system. This ensures a deep, throaty sound, but voids the E-approval.