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Description:
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Toyota TRD Cat-Back Exhaust System
Cat back muffler provides a combination of increased horsepower with a throaty growl. Made from 304 stainless steel for excellent corrosion resistance and durability and features a TRD etched, polished stainless steel tip. These systems reduce back pressure for added low-end/mid-range torque and improved horsepower - between 5 to 8 wheel horsepower - depending on application. They produce a deep, throaty tone, while meeting the legal 95db noise limit. These systems use factory gaskets and hardware where appropriate for easy installation, premium quality and a precise fit. They use factory-type flange connectors for lifetime sealing and existing factory mounting hangers for proper fit.
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No drone at the mid range RPMs that I've noticed. TRD usually has good stuff from what I hear with plenty of research and testing going into a product. I'm happy 
