INDUSTRIAL INJECTION 412604 GM INJECTOR RETURN LINE BOLT KIT — 2001–2004 6.6L LB7 DURAMAX (SET OF 8)

Stop leaks and stripped hardware during LB7 injector work. The INDUSTRIAL INJECTION 412604 GM INJECTOR RETURN LINE BOLT KIT is a direct-fit replacement set for the 2001–2004 6.6L Duramax LB7. Supplied as a complete set of eight (8) return line banjo bolts—one per injector—for a clean, reliable reassembly.

Fitment

• 2001–2004 GM 6.6L Duramax LB7 (Silverado/Sierra 2500/3500 HD)

What’s Included

• (8) Injector return line banjo bolts (LB7)

Why This Kit

• Direct replacement for damaged/stripped LB7 return bolts
• Full set of 8 ensures even clamp load and fresh hardware at each injector
• Ideal during injector service to prevent reassembly leaks

Recommended Parts (CPP internal links only)

• Industrial Injection RTF26402 Injector & Return Seal Kit (LB7, services 4 injectors)
• DTech DT660020 Fuel Return Line Gasket Kit (LB7)
• Dorman 904-554 Single Return Line Banjo Bolt (LB7) — single-bolt alternative
• Alliant AP0059 Single Return Line Banjo Bolt (LB7) — single-bolt alternative
• Shop Duramax Injectors & Nozzles
• Shop All GM Duramax Parts

Helpful Notes

• Use new sealing washers when servicing the return line; verify torque to OE spec.
• One bolt per injector; LB7 uses 8 injectors total.

FAQ

This is a set of eight (8) return line banjo bolts—one per injector on LB7.

Yes. We recommend pairing with a return line seal kit such as RTF26402 or DT660020 to prevent leaks.

No. This kit is specific to 2001–2004 LB7. For other generations, browse GM Duramax parts.

Yes—see the Dorman 904-554 or Alliant AP0059 single-bolt listings.