and,imo, it was a worthwhile upgrade. After having Harry(ztuner)tweak the ecu 26 whp & 13 ftlbs was gained. It's all about gear selection though since you'll need to stay between 4800 & 7000rpm to stay in the powerband. The cams have made my n/a quite competetive with mustanks, Z33's, G35's etc. If you're getting them to race the 1/4 mile you may be dissapointed. Auto-x & 4th gear highway pulls is where you'll truly see the difference. Also if you do tt your Z the cams will carry over and be a good addition for a street driven tt. It's all about the tuning after installation to really get the most out of them. Good luck.
