Post by
ezflow »
https://forums.nicoclub.com/ezflow-u45427.html
Wed Aug 30, 2006 7:19 am
If you do the intake might as well do the Z tube to make it complete. Maybe 1 or 2 hp difference.Add a plenum spacer, and then a decent cat-back exhaust, like the Stillen, and you should be able to round out at 300bhp+ (about 240+ at wheel). Cost, well under 2K. Without the exhaust, you will likely still be pushing a solid 10-14 hp increase.
An ECU flash or piggy-back can run from about $400-900. Jury still out on what's best and how much gain. But I would concentrate on the bolt ons first and see how you like it.
Many claim the grounding cables smooth things out more, and work better with the auto. Relatively cheap and fairly easy upgrade.
Your stock 04 5AT should be running about 220-225 at the wheel right now.