Chinese exhaust (agency power, lol), my own custom test pipes (certain company screwed up and sent me G35 test pipes, got very custom to make them fit, lol), Stillen long tube intakes.
Fully tuned on ECUTek, vs bone stock baseline. I actually have a full step by step test (I put the test pipes & exhaust on first, then tuned; then put on intakes, and tuned again) of the parts. The exhaust mods pretty much made power using just my stock tuned calibration from before, minor changes.
When I put on the Stillen intakes they lost power pretty much EVERYWHERE, even after fixing the fueling. I had to get really in depth with the VVEL mapping and then I was able to extra power out of the car with them.
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