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Discussion Starter #1
2007 mazdaspeed 3 with cat delete manzo downpipe, intake and hypertech tuner. I found an exhaust leak around the turbo to downpipe gasket and it's only getting 14psi of boost, could this be the reason that it's running lean and having a boost issue? All the vacuum lines and tight and in good shape.
 

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You should fix the connection from the turbo to the downpipe. I believe a leak that close to the turbo will make your car run pretty badly.
 
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