2002–2004 LB7 Duramax: Boots or the Full Pipe Kit?

Replacing worn intercooler boots doesn’t always mean replacing the pipes. The right choice depends on what needs attention: the flexible boots, the metal pipes or both.

Mammoth offers a boot kit, a 3-inch pipe and boot kit, and a combo that adds radiator hoses.

Check the plumbing before ordering

Mammoth’s LB7 intercooler kits are listed for 2002–2004 trucks. Confirm you have the LB7 engine and compare the installed pipes and connections with the kit.

The model year or VIN alone cannot confirm which plumbing is currently on the truck. If yours has 2001-style intake plumbing, replacement pipes or other modifications, check with Mammoth first. That applies even if your truck is titled as a 2002.

For a 2001 truck, don’t assume these kits fit. Send photos and relevant measurements through our contact page so we can review the setup.

Boots only: keep sound factory pipes

The LB7 silicone intercooler boot kit includes reinforced silicone boots and stainless steel T-bolt clamps. It is listed as a factory-style replacement.

Choose it when the boots need replacing and the factory pipes are undamaged. Inspect for cracks, dents, holes and worn areas where pipes have rubbed against nearby parts. A new boot won’t repair a damaged metal pipe.

Pipes and boots: replace both sides

The 3-inch LB7 pipe and boot kit includes:

• One polished hot-side pipe
• One polished cold-side pipe
• Four silicone boots
• Eight T-bolt clamps

It works with the factory intercooler. Consider this option when a pipe needs replacing or you want both pipes and their boots in one kit. A new intercooler is not included.

Combo: add radiator hoses

The LB7 pipe, boot and radiator hose combo includes both pipes, four boots and eight T-bolt clamps, plus upper and lower silicone radiator hoses.

Choose it when the charge-air plumbing and radiator hoses both need attention. If only the radiator hoses need replacing, see the separate 2001–2005 Duramax coolant hose kit.

The simple choice

Sound pipes and worn boots? Start with the boot kit.
Damaged pipes? Consider the pipe and boot kit.
Radiator hoses need replacing too? Compare the combo.

Match the parts to your truck’s actual setup before installation. Don’t force a connection that doesn’t line up; stop and check the fit.