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I have a blacktrax Y pipe with out the ECS. I manually open mine and it runs open header. I made only 2.6 more WHP with my Y pipe open on 10 pounds. Then again, we ran into problems with the turbo ... I will dyno again when I get my new one in and post up dynos with it closed and open. Turbo goes in on the 20th so give me till the end of next month.
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