INDUSTRIAL INJECTION PDM-07021K GM INJECTOR SCREW-IN CUPS — 2001–2004.5 6.6L DURAMAX LB7 — INCLUDES INSTALL TOOL & HARDWARE

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

LB7 press-fit cups are prone to pitting and leakage. Threaded, screw-in cups provide positive retention and improved long-term sealing.

This kit includes the head tap and dedicated install tool. Professional machining and proper thread prep are highly recommended.

Yes — it covers 2001–2004.5 LB7 Duramax heads (Chevy/GMC 2500HD/3500HD).

Plan on head gaskets, injector return line seals, and consider new high-pressure lines to prevent contamination-related failures.