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Don't know where you heard "they're not right" for a given car.
A twin scroll turbo will always outperform an identical single scroll turbo.
Whether you want to spend the money to install everything required to support a twin scroll turbo is another question.
But if you take 2 turbos that are identical except one is TS and one is not, the TS turbo will always spool faster and maintain full boost longer.
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Senior Member
Welp, schooled again! Thanks for all the info, guys. In any case, my plan has always been to build this with as much stock stuff as possible. So I decided to hunt craigslist for a used TD04L to match the one I had with busted vanes. I also considered rebuilding my own. It just depends on what gets done first.