The MagnaFlow 4" Exhaust Tip # MF35212 that you referenced will fit the tailpipe of your 2015 Toyota Tundra V8 5.7L Flex but it's not going to affect the sound of the exhaust in any way. view full answer...
A resonator tip like the part # PM-5104 that you referenced is designed to actually increase sound so it wouldn't be what I would recommend for the drone you are experiencing.
If you are looking to reduce drone your only option would be to go with a chambered muffler to replace the bullet muffler you currently have.
The easiest solution I can make for you would be to go with a Magnaflow part # MF15304 if you have a Crewmax or Double cab.
Your other option would be to... view full answer...
Sounds like the cut out you installed on your 2007 Toyota Tundra with a V6 makes the exhaust pretty loud when accelerating, but once you hit cruising speed the sound level drops off quite a bit.
Although it may seem like it's quieter than the stock exhaust I can assure that it is louder. There is no way the stock exhaust would be quieter at idle but then be louder than the cut out at highway speeds. The only way to increase the volume of your exhaust at this point would be... view full answer...
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