2020-2026 L5P Duramax Stage 2 High Flow Intake Bundle Kit

Stock 2020–2026 L5P intakes and charge pipes leave airflow and boost sealing on the table — plastic intake pieces, a two-piece 2.5" hot side, and a leak-prone plastic/rubber cold side. Wehrli’s Stage 2 bundle fixes both sides of the turbo path: a 4" fabricated intake with horn and air box up front, plus the Stage 1 3" / 3.5" mandrel-bent intercooler pipes after the turbo — more cool air, fewer blown boots, no tune required on a stock truck.

What you get: 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 billet adapter with double O-rings; silicone boots and stainless T-bolt clamps. Factory connection points and sensors stay in place. Bundle pricing beats buying Stage 1 pipes and the Stage 2 intake separately.

Wrong kit?

• Want pipes only (no air box/horn) → Stage 1 WCF100410
• Want Stage 2 + ceramic DOC-back downpipe → Stage 3 WCF100418
• 2017–2019 L5P → Stage 2 WCF100441 or Stage 1 WCF100718
• Cannot ship to California (manufacturer restriction)

Common powder colors often ship in a few business days; custom colors have a longer lead — see Availability. Idaho Falls shop installs available when bay time allows.

Call 208-542-7793 with year/make/model to confirm Stage 2 vs Stage 1 or Stage 3 for your build.

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