PPE headers are actually more expensive if you want them in 304ss and ceramic coated. They advertise a +23whp gain on a nismo and there is member on here who says he got +20whp with a stillen CBE (no dyno sheet yet).
Tony what is the gain for your LTHs? (CBE vs CBE + LTHs), if you don't mind me asking? I am sure its posted somewhere, but I am on the phone and its a PITA to search lol.
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