2017–2019 L5P Duramax Intercooler Boots: Fitment and Kit Contents

Mammoth’s L5P intercooler boot kit is listed for 2017, 2018 and 2019 Chevy Silverado and GMC Sierra trucks with the 6.6L Duramax L5P engine.

Check your year and engine

A Duramax badge alone isn’t enough to choose the right kit. Match your model year and engine to the product’s fitment information, especially if the intercooler plumbing has been changed.

Have a 2020 or newer L5P? Those years aren’t included in this kit’s current fitment listing. Contact us before ordering rather than choosing by engine name alone.

What’s included?

• Four silicone intercooler boots
• Eight clamps
• No replacement metal intercooler pipes

Boots are the flexible couplers at the joints in the intercooler piping. If you need a metal tube replaced, don’t order this kit expecting one in the box.

Materials, colors and warranty

The boots use 5-ply silicone aramid construction and are available in Black, Blue or Red. Mammoth parts are backed by our limited lifetime warranty. See the policy for coverage and claim requirements.

Choose your kit

Check the L5P product page for current options and fitment details. For an earlier engine, browse our Duramax intercooler parts by model year. Contact Mammoth if you’re unsure which kit you need.