Introducing the HSP Stock Turbo Inlet Horn

The 103-HSP, affectionately known as the HSP Stock Turbo Inlet Horn, is a must-have upgrade for your 2001-2004 Duramax-equipped Chevrolet and GMC Trucks. If you own an LB7, this is one part you definitely don’t want to overlook. Trust us, the HSP Stock Turbo Inlet Horn outshines the factory version by a long shot!

Why Consider the HSP Stock Turbo Inlet Horn?

The stock turbo inlet horn on LB7 trucks leaves a lot to be desired. Many enthusiasts, including those at HSP Diesel, have noted a few key reasons for this. Let’s talk about performance: the factory turbo inlet horn is quite restrictive, failing to funnel air efficiently into the turbo due to its size and bends. Plus, it’s pretty plain-looking and doesn’t do much to spruce up your engine bay.

What Makes the HSP Stock Turbo Inlet Horn Stand Out?

For starters, the HSP Stock Turbo Inlet Horn boasts a generous 3.5-inch diameter, which is significantly larger than the factory piece. This increase in size allows for much better airflow. One of the biggest complaints from LB7 owners is that the stock turbo often feels choked. The factory IHI turbo thrives on air intake, and with the HSP Stock Turbo Inlet Horn, you can feed it much more air than before. Many customers have reported noticeable power gains without making any other changes. When paired with the HSP Diesel Cold Air Intake, we even observed a slight drop in exhaust gas temperatures!

What’s Included with the HSP Stock Turbo Inlet Horn?

• Turbo Inlet Horn
• (3) M6x1.02x20mm bolts

Compatibility Information

• LB7: 01-04 VIN Code 1

How to Identify Your VIN Code

Your engine code can be found as the 8th character in your VIN number, while the 10th character indicates the year of your truck.

*Important Installation Note*

Please use only the bolts supplied with the kit. Avoid using factory hardware for installation.

Key Features

• Designed as a direct replacement for stock applications
• Increased airflow for better performance
• Boosted power output
• Optional powder coating to enhance your engine bay's appearance
• Extended turbo life
• Faster turbo spool-up

Our Commitment to You

HSP No BS? Limited Lifetime Warranty

At HSP, we believe in standing behind our products. We’ve always gone the extra mile for our customers, and now we’re taking it a step further with our No BS? warranty. This means you can trust that we’ll take care of you, no matter what. Below, you’ll find all the details about our warranty process and guidelines, ensuring you have a clear understanding of our commitment to quality.