Product Description
Lock down your LB7 injector cups for the long haul. INDUSTRIAL INJECTION's screw-in (torque-lock) cup kit replaces press-fit OEM cups that are known to pit, leak, and seize. This kit positively threads the cups into the head to improve sealing and long-term reliability on 2001-2004.5 6.6L Duramax LB7 engines.
Fitment
- 2001-2004.5 GM 6.6L Duramax LB7 (Silverado/Sierra 2500HD & 3500HD)
What's Included
- (8) Torque-lock (screw-in) injector cups
- (16) Injector cup O-rings
- (1) Cylinder head tap
- (1) Torque-lock cup install tool
- (1) Bottle of tapping fluid
Why This Kit
- Positive threaded retention helps prevent cup movement and coolant/fuel cross-leaks
- Service-ready kit includes tools and seals for a clean install
- Proven LB7 upgrade when rebuilding heads or solving persistent cup leaks
Recommended Parts (CPP Internal Links)
- MAHLE HS54580 Head Gasket Set - 01-04 LB7
- LB7 Injector Fuel Return Line Kit - 01-04.5
- ARP 230-4201 Head Stud Kit - 01-16 Duramax
- Duramax Fuel Injection Lines & Related
- S&S LB7 SAC00® Stock-Flow Injector Set
Helpful Notes
- Machine shop installation strongly recommended; verify thread prep, cup depth, and sealing per spec.
- Always clean/replace high-pressure lines and refresh return line seals during injector/cup service.
Cross-Reference / Alternatives
- S&S TorqueMaster LB7 Injector Set (New)
- S&S 30% Over LB7 Injector Set (New)
- GM Duramax Studs & Bolts Category
FAQ
Why replace the factory press-fit cups?LB7 press-fit cups are prone to pitting and leakage. Threaded, screw-in cups provide positive retention and improved long-term sealing.
Do I need special tools?This kit includes the head tap and dedicated install tool. Professional machining and proper thread prep are highly recommended.
Will this fit all LB7 model years?Yes - it covers 2001-2004.5 LB7 Duramax heads (Chevy/GMC 2500HD/3500HD).
What else should I replace during the job?Plan on head gaskets, injector return line seals, and consider new high-pressure lines to prevent contamination-related failures.
| Specification | Details |
|---|---|
| Brand | Industrial Injection |
| Part Number | PDM-07021K |
| Fitment | 2001–2004.5 GM 6.6L Duramax LB7 |
| UPC (GTIN-12) | 840256913644 |
| GTIN | 840256913644 |
| Includes | (8) screw-in injector cups, (16) O-rings, head tap, install tool, bottle of tapping fluid |
| Prop 65 | WARNING: Cancer and Reproductive Harm — www.P65Warnings.ca.gov. |