FLEECE FPE-INTAKEHORN MODIFIED LB7 INTAKE HORN

Uncover the cheapest 15 HP you’ll find for an LB7: the FLEECE FPE-INTAKEHORN MODIFIED LB7 INTAKE HORN. This high-flow, cast-aluminum horn frees up intake airflow on 2001–2004 Duramax LB7 trucks, sharpening throttle response and helping your turbo breathe easier. Includes a new gasket for a clean, leak-free install. Fleece LB7 intake horn, high flow intake horn LB7, modified intake horn Duramax 01 02 03 04, CPP Diesel Fleece Performance, easy horsepower upgrade, plug and play airflow

Why it wins

• Proven gains — back-to-back pulls show ~15 HP increase on LB7
• Cast aluminum construction with OE-quality fit
• Includes new gasket for a tidy, reliable seal
• Simple bolt-on; great bang-for-buck upgrade

Fitment

Engine: 6.6L Duramax LB7
Model years: 2001–2004 Silverado/Sierra 2500HD/3500 (LB7)
Notes: Direct replacement intake horn for LB7 applications

Cross-Reference / Related Fleece Items (CPP Diesel)

• FLEECE FPE-LB7-IAH-DELETE — LB7 Intake Air Heater Delete Plug
• FLEECE FPE-FL-LB7-27 — LB7 High Pressure Injection Line (Cyl 2 & 7)
• FLEECE FPE-TL-LB7-LLY — Allison Transmission Cooler Lines (2001–2005)
• FLEECE FPE-PF-GM-0104 — PowerFlo In-Tank Lift Pump (01–04 LB7)

Fleece reports about a 15 HP gain on back-to-back dyno pulls compared to stock, thanks to reduced intake restriction on the LB7.

Cast aluminum intake horn and a new gasket for a clean, reliable install.

No tuning is required for this intake horn upgrade.

No — this part is designed specifically for the 2001–2004 Duramax LB7. See other Fleece SKUs for later generations.

Specifications for FLEECE FPE-INTAKEHORN