I sent a pair of Trick Flow 240’s to Dwayne to check out and inspect.....he said they were good to go the way they were. Guides were right on. Springs, retainers and locks...high quality. They are running as expected.....very well.

I have also run RPMs since 2004 and changed springs to suit my cams, and they are still running great till this day.

And, i have a set of 440 Source non-cnc ported heads that i changed out all the hardware and springs for an upgrade. Those are home ported and also run great.