Originally Posted by Moriar
Not true at all..
I had a 325is that when stock had 155hp at the wheel.. then after Racing Dynamics (Electrodyne) got ahold of it, it put down 189.5 WHeel hp.. N/A
The current 2.5, 3.0, and 3.2 are all at their limits, simple mods like air intakes, exhuast upgrades result in little gain of performance. Even going bigger in mods like cams, or even a ported head results in small 5 to 10 rwhp gains after tuning. To gain substantial gains requires a power adder, good on you for gaining 10 more rwhp than average, but I am sure it was with an older 2.5, not the current production version.