Product Description
Stabilize rail pressure and prevent uncontrolled fuel discharge with the Exergy E07 00010 1800 Bar (26,000 PSI) Pressure Relief Valve (PRV). Calibrated by Exergy Performance, this PRV is a direct-service replacement/upgrade for Cummins 6.7L and GM Duramax LLY/LBZ/LMM fuel systems.
Key Benefits
- Calibrated release at ~1800 bar (26k PSI) to protect the high-pressure fuel rail
- Helps cure rail-pressure bleed-off and hard-start/low-power conditions caused by a leaking OE valve
- Precision-built by Exergy for repeatable cracking pressure and durability
- Direct-fit with OE-style threads and sealing
Fitment
- GM Duramax: 6.6L LLY (2004.5–2005), LBZ (2006–2007), LMM (2007.5–2010)
- Ram Cummins: 6.7L (selected model years with PRV-equipped rails)
What’s Included
- Exergy E07 00010 1800 Bar Relief Valve
- Sealing washer(s) as required
Recommended Supporting Parts
Pair your PRV with high-quality filtration and, if you’re increasing fuel demand, Exergy-brand injectors matched to your platform:
- Duramax/Cummins Lift Pumps (AirDog / FASS)
- Exergy Injectors – Duramax LLY:
- Exergy Injectors – Duramax LBZ:
- Exergy Injectors – Duramax LMM:
- Exergy Injectors – Cummins 6.7L:
- Shop All Exergy Performance
Install Notes
- Relieve fuel-system pressure before removal. Clean the port and threads; do not allow debris into rail.
- Torque to OE spec for your platform. Replace sealing washers as required.
- After installation, prime the system and verify commanded vs. actual rail pressure in a road test.
Frequently Asked Questions
Q: What symptoms indicate a failing PRV?
A: Hard starting, low commanded rail pressure under load, or codes related to rail-pressure regulation. If the stock valve leaks, the Exergy 1800 bar PRV restores proper relief behavior.
Q: Do I need tuning with this PRV?
A: No tuning is required; it’s a protection/consistency part. If you pair it with higher-flow injectors or pump work, tuning may be beneficial.
Q: Is this a direct fit?
A: Yes—OE-style fitment on rails for Duramax LLY/LBZ/LMM and Cummins 6.7L applications that use this PRV style.
About Exergy Performance
Exergy specializes in precision-calibrated fuel-system components for Duramax and Cummins platforms. Browse more parts here: Exergy Performance at CPP Diesel.
