Re: custom y-pipe or stock y-pipe?
Sorry, but free-flowing is not always best. People complain about "restrictive" stock exhaust... but you NEED that restriction to create the low-end grunt. I agree with what was posted originally... Replace the muffler with a nice free-flowing one (I love my Magnaflow 18" Center/Offset) and leave the stock piping alone.
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Vehicle: 2005 Toyota Tundra Double Cab 4x4 vvt-i 4.7L V8 in Timberland Mica
Current Mods: Donahoe Racing Adjustable 2.5" Coilovers, Hellwig Rear Sway Bar, Bilstein 5100 Shocks, TRD Add-A-Leafs, Magnaflow 18" oval custom cat-back exhaust, Genuine-Toyota Tundra rubber floor mats, Delphi Roady2 XM Radio, USA Spec dual-aux input adaptor, custom-built dash-mount auxilary input for iPod, JL Audio 10W1v2-4 subwoofer, JL Audio e1200 monoblock, BedRug, Challanger step bars (Genuine-Toyota accessory), AVS Bugflector II
Future Mods: Westin Chrome Nurf Bars, Wheels, Tires, Double-Din Navigation, Leather seat-skins
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