We all know why the W1 housing cracked lol horrible afr’s. All I know is the W1 has a TD04 CHRA not sure about pure. All in all the W1 from mine will be sold for the ball bearing W2 drop in with a TD05 CHRA
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Well the thing is one of the best tuner's for the 10th gen civic even said modifying a stock turbo decreases it's durability. W1 on the other hand is not made from a stock turbo and is 100% made from scratch is the difference.