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Is it for corrosion purposes or wanting a different sound? It would seem to me in rust prone places aftermarkets deteriorate fast. I have no idea how much a LS430 exhaust costs, or if it even corrodes say in the northeast. But I could see on some cars OE replacement is cost prohibitive. Only that I can attest to a Walker lifetime system lasting 12-18 mos in the Northeast. And also attest to nobody honoring the lifetime warranty.
Majority of the answers you will receive on here will be people telling you to stay OEM.
That being said, you will most likely have to go custom if you're wanting a louder sound, or buy mufflers from Japan / Croooober / etc and have them installed.
If you just want a little extra sound, do what I did and keep everything stock but remove the mufflers. Keep the Y-pipe, small cat after the Y-pipe, and the dual resonators. From the resonators, have them weld on some 2" to where the mufflers were, then that last foot of length, have them step it up to 2.25" with stock looking turn-downs or chrome/stainless tips of your choice.
The exhaust remains quiet with a nice, mellow rumble, sounds really good around 3k to 5k rpms, then sounds nearly stock to redline. The only real drawback is a slight drone around 1800 to 2k rpm. Otherwise, it sounds really good and is NOT obnoxious at all.
Always have a good custom muffler installed to begin with. You can customize the sound by upgrading the resonators, and or changing the headers, which are extremely restrictive in stock.
Muffler delete is an okay option, I am not a fan of it at all. The drone will always be there, whatever you do with other parts of the exhaust.
Installing x pipe instead of 3rd cat is a nice option as well.
1800 to 2K rpm is where the motor lives a lot of the time. Our cars are made to be quiet. Why mess with one of its best features?
Not true for where I drive. In city or on the highway, the engine never sits at those rpms. It's only at the shift points where it stays at those rpms in city. Once in 5th, it's well below and almost silent.
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Slideshow: A five-car lineup spanning more than five decades of Toyota performance and engineering will tackle one of Italy's most celebrated automotive routes.
