Fleece Performance High Flow Intake Horn - 2017-2019 Chevy/GMC 2500HD/3500HD 6.6L Duramax L5P

The stock intake horn on the 2017-2019 Chevy/GMC 2500HD/3500HD 6.6L Duramax L5P is a choke point between the intercooler and the engine. The Fleece high flow horn opens that path up with a larger cast aluminum piece.

It is one of the cheapest horsepower bolt-ons you can buy for a Duramax. It also helps exhaust temps and spool, and it bolts in with no tuning.

It goes from the stock 2.4 in. plastic runner to a 3.3 in. cast aluminum horn. Fleece rates the gain at up to 10 rwhp with no tuning.

Features

• Cast aluminum, larger than stock
• Bolt-on with no tuning
• Better airflow into the engine

Specs

• Fleece part number: FPE-L5P-INTAKEHORN
• Shipping weight: 2.7 lb
• UPC: 670875718951
• Emissions: not CARB exempt. Not legal for road use in California or other states that follow CARB rules on pollution-controlled vehicles

Fitment

• 2017-2019 Chevy/GMC 2500HD/3500HD 6.6L Duramax L5P

What's included

Cast aluminum intake horn with a new gasket or seal. The L5P version adds a billet PCV fitting and mounting hardware.

Install notes

Hand-tool install, about an hour.

California and CARB states: this part does not have a CARB exemption number, so it is for off-road or racing use on pollution-controlled vehicles in those states.

Not sure it fits your truck? Call the shop at (806) 503-2161 and we will confirm before you order.

Ships direct from a US warehouse in 1-3 business days. Most parts drop-ship directly from the manufacturer or distributor warehouse; tracking is emailed as soon as it ships.

Free shipping on qualifying orders. Free local pickup in Ropesville, TX.

Questions? Call (806) 503-2161 (Mon-Fri 8am-5pm CT) or email blackdiamondultd@gmail.com.