The heat to the titanium headers will cause their life to be shortened. I have had welds break constantly on my old s2k (which is known for hot exhausts). I would stick to stainless and then have them insulated to keep the heat in the exhaust gases to help with exhaust velocity. Twin top mounts will be much further from the exhaust ports thus slowing spool of the turbos...
Not to mention you dont want to hack up a nice titanium header... If it was me I would pick up a set of used Z1 headers and go to town... or Do like ETS did for the GTR and go to 1.8" runners and make some big power!
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Shop Cars: 2013 318whp Nismo VspecII 370z *SOLD*, 2009 1000hp+ 93oct 4.0L TT 370z Fast Intentions STAGE 4 #054
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