Updating this thread since there really isn't much out there on 200 series exhaust mods. Decided to give this a go for myself but went with a Borla ProXS 40349 as they have the reputation of being quiet, plus that tundra video seemed pretty up my alley. The muffler is a 3"/2.5" single/dual with a 4x9.5x19" body. Got it installed Tuesday with no other mods. It's a mixed bag but ultimately a no go in my opinion. Once warm it's definitely louder than stock outside the truck but not obnoxiously so. You're not going to set off any car alarms. Nice tone, really smooth, a little higher pitched and less rumbly than all the magnaflows I've had on my last 5 vehicles. Very "euro" sounding is the adjective I want to use. It's actually also quite agreeable at most RPMs. With the radio on at usual levels it's just barely noticeable in the background. BUT, here's the kicker...between 1900-2500 RPMs it's absolutely brain melting drone. Just an incredibly loud nauseatingly annoying bwaaaaaaaaa at 151hz (according to an app on my iphone). Above and below it's just fine. My wife noticed a difference but did not complain....until the engine was under load on the freeway going uphill.
I considered welding up a quarter wavelength resonator myself this weekend but when I got under the truck there really isn't a good place to put it (at least on an LX). The 151hz frequency would need around a 28" long pipe to block the drone but unless I lowered the muffler a few inches and got rid of the disconnect right after the muffler, there's just no room. Doing so would set the muffler a little lower than the frame rails which I don't want to do and I also don't want to do away with the disconnect. No dice.
Here are my thoughts: A similar Borla muffler on a tundra is significantly quieter at all RPMs yet also doesn't seem to drone. Watching more videos I've also noticed the factory muffler on a tundra is much smaller than a stock 200 series. Ours measures about 8.5x12x24". This is making me think we 200 series owners just need something larger. I'm going to try the largest Magnaflow offering and see how it goes. It's a #12588. 5x11x22". I've found a single youtube video of a tundra with this exact muffler and it honestly sounds stock. I'm already out a few hundred because I had a shop do the initial welding for me. This go around I'll weld it myself. Worse case another $200 gone and I'll put it back to stock. Best case I like it and get to make fun noises everywhere I go. Fingers crossed!
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