Product Description
Dual-spring control for high RPM, lift, and boost. Hamilton Cams 07-S-002 is a USA-made dual valve spring set for the 1989–1998 Cummins 5.9L 12-valve. It includes retainers and 10° locks and is suitable for aggressive cam profiles (good to ~0.700" lift when set up correctly).
Fitment
- 1989–1998 Dodge Ram 2500/3500, 5.9L Cummins 12-valve (6BT)
- Direct fit with compatible retainers/locks (included in this kit)
Installer note: Installed height must be set by a qualified machine shop. Some heads may require smaller stem seals and a light guide/seal boss cut for seal clearance.
What’s Included
- Dual valve spring set (inner + outer per valve)
- Matched retainers
- 10° valve locks
Recommended Supporting Parts
- Hamilton Extreme Duty Pushrods (12V): 07-P-002
- Hamilton Large Valves (12V): 07-H-002
- CPP 12V Valve Spring Compressor Tool: CPP-12V-SPCOMP
- Hamilton 178/208 Cam Combo (12V): 07-CC-12V178
- Hamilton 188/220 Cam Combo (12V): 07-CC-12V188
Cross-Reference / Alternatives
- Hamilton 165# Conical/Beehive Springs (12V): 07-S-001
- CPP 60lb Springs (12V): CPP C14010
- BD Diesel 60lb Spring Kit (set of 6): BD 1030060
- OE-style Intake/Exhaust Hardware:
FAQ
How much lift will these springs support?They are suitable for aggressive cam profiles and are listed as good up to ~0.700" lift when set up to the correct installed height by a competent machine shop.
Do retainers and locks come with this kit?Yes. Retainers and 10° valve locks are included with the 07-S-002 dual spring set.
Will I need to modify my head or seals?Some heads require smaller stem seals and a light cut to the seal boss/guide for clearance. This is a common, quick machining step—consult your machinist.
What else should I upgrade with a hotter cam or more RPM?Pair these springs with Hamilton 07-P-002 pushrods and consider a Hamilton 188/220 cam combo for stable valvetrain control.
DIY install tips?Use the dedicated CPP 12V spring compressor. Set installed height carefully and verify coil bind and retainer-to-seal clearance.
