2017-2019 L5P Duramax Stage 2 High Flow Intake Bundle Kit

2017–2019 L5P trucks share the same weak spots as later years: restrictive plastic intake parts, a two-piece hot-side pipe with a resonator joint, and a leak-prone plastic/rubber cold side. Wehrli’s Stage 2 bundle swaps all of that for a 4" fabricated intake with horn and air box plus 3" / 3.5" mandrel-bent intercooler pipes — more flow, better sealing, no tune required on a stock truck.

What’s included: 4" aluminum intake pipe; 4" intake horn with PCV port and surge ring; 10G aluminum air box with dry filter and Outerwears pre-filter; 3" hot-side and 3.5" cold-side IC pipes; CNC flange with double O-rings; silicone boots and stainless T-bolt clamps. Factory sensors and connection points are retained. Bundle pricing beats buying the pipes and intake kit separately.

Wrong kit?

• Want pipes only → Stage 1 WCF100718
• 2020–2026 L5P Stage 2 → WCF100414
• 2020–2026 L5P Stage 3 (adds DOC-back downpipe) → WCF100418
• Cannot ship to California (manufacturer restriction)

Stock powder colors often ship in a few business days; custom colors have a longer lead — see Availability. We can install in Idaho Falls when the bay’s open.

Call 208-542-7793 with year/make/model if you’re choosing between Stage 1 and Stage 2 for a 2017–2019 L5P.

Emissions-compliant performance only — Powertech Diesel does not sell deletes or defeat devices. Retains factory emissions equipment.