Its kinda pointless now a days...unless you have a diesel. that was an early concept because turbos couldnt spool up fast enough, so they needed something for the bottom end. unless you just want it for the cool factor...lol..than go for it. toyota themselves already solved that too, with the sequential style twin turbo on the mk4. Plus unless you do a 2 way valve kinda thing, its just gona be a restriction when the turbo spools.
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