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The P-Series has a high crush for maximum retention
020 (224-3673WR
This will bolt right onto your stock turbo and is made to reduce back pressure
Make valve spring maintenance a breeze with our 12-Valve Spring Compressor Tool
1989-1998 Cummins 5.9L Hamilton Cams HD Valve Springs (07-s-001) 2001 - 2004 GM Engine Builds The P-Series has a highUpgrade your 12 valve Cummins valvetrain with our Conical Beehive Valve Springs, delivering 155 lbs of seat pressure to keep valves firmly under control up to 4,500rpm RPM or 65lbs of boost drive pressure. This conical design offers enhanced stability for moderate cams and OEM size valves, all the way up to 4,500 RPM. Why Conical Beehive Springs? Improved Valvetrain Control: Reduce valve float and reversion, critical issues when boost and RPM levels