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tl;dr version
- take off metal under pan
- take off paper pan
- unbolt passenger side engine mount
- remove stock header
- lift engine gently
- remove overpipe
- put ace over pipe where stock overpipe was, but do not tighten down
- drop engine back down and torque engine mount
- put on ace header
- torque header to engine
- bolt ace merge overpipe to header
- bolt ace merge overpipe to front pie
- check torque
- flash tune
- revise tune
- check torque on all hardware after a few heat cycles. Re-check until a subsequent recheck yields no additional torque being needed.
O2 sensors left out to do at your convenience.
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