Heres the situation. I replaced the o2 housing and manifold with a buschur unit o2 housing was megan. I had an exhaust leak before I was aware of and knew where it was. Now after replacing all these parts I sitll have a leak but just don't know where now. Manifold was torqued down properly and evenly, same with o2. Only thing I can think of is donut for the downpipe to the o2 housing. Which I replaced with a new donut and new bolts, whats the best way to find this leak. It really annoys me. Holds boost fine 21 psi tappering to 20 at redline. I just don't know where else to look.

 

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