Post by
brianw »
https://forums.nicoclub.com/brianw-u65970.html
Sun Aug 05, 2007 9:42 pm
The jury is still out on those. Notice the gains are from 3900-5100rpm, basically, and pretty minimal to non-existent elsewhere, plus they were done on a stock engine.
Could be worthwhile, but further evaluation is needed. For lightly modded vehicles they may be worth the trouble, but for more heavily modified vehicles I would have lots more questions to ask at this point-- especially those of you with cams/ECUs who are breathing considerably better above 5000rpm.