MagnaFlow 03-21 Toyota 4Runner V6 4.0L Overland Series Cat-Back ExhaustThe MagnaFlow Toyota 4Runner Overland Series Cat Back Performance Exhaust System #19546 will enhance your 4. 0L V6 Toyota 4Runner (2003 2021) with MagnaFlow s renowned deep rumble and dyno proven performance. MagnaFlow #19546 is weight optimized for additional utility and designed such that its mandrel bent 2. 5in. diameter main piping is situated more closely to the body than the stock configuration. This combined with a single high clearance no tip;