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Discussion Starter · #1 ·
Well installed 5" exhaust a couple weeks ago. Noticed when I drive it now it sounds like the turbo is spooling but boost gauge isn't moving. More black smoke than normal, runs fine but I thought under lower throttle pressure I was seeing 3-4 psi. If I am cruising on hwy around 70+ I make boost easily, I can still make 26 psi if I stand on it. I have 160 cc injectors installed already. Should I put a muffler back on for the back pressure for the turbo, low end power just feels down.

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