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Doug Thorley Y-pipe. Fits 2007-14 FJ/4runner 4.0 V6. Exhaust tone is slightly more aggressive, mainly the piping is smoother and flows better than stock. Replaces rear cats for resonators. Off-road use recommended. I'm a believer that my average mpg increased about 1.5mpg cruising after logging mpg data. Heat wrapped, gaskets and hardware included. $300 shipped.
 

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