What you need to do is adjust them REAL tight. We noticed how they would leak alot..so we ended up tightening them down to when there was only 2 THREADS left outside. We also spoke to a APEXi engineer about this and he agreed on us about this..he even said they are rated at 15psi. We have ran up to 24psi on upgraded turbos with them and they have been fine, but they need to be real tight. We tried Blitz after with the harder spring and they didn't work that well. We run HKS now on the race car. They work good. Old faithful is the Greddy Type S..they always work good period.
Gyro DSP Racing Miami, FL AOL Instant Messenger: GyroDSP Email: dspracing@visto.com DSP Racing (305) 207-3852