Product Code: 118-HSP-X

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HSP Diesel LB7 3.5'' Turbo inlet horn

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The factory LB7 turbo inlet horn is very restrictive. This causes the IHI turbo to not only work harder to pull in fresh clean air, but also hinders spool-up and overall horsepower.

We at HSP Diesel have designed a massive 3.5’’ replacement unit, that will allow your LB7 Duramax, and its factory IHI turbo charger to consume as much air as possible.

With this small addition to your truck, you will see quicker spool-up, and extended turbo life. Many customers reported power gains, and with the addition of the HSP Diesel Cold Air Intake saw a slight drop in exhaust gas temperatures.

This was designed as a direct replacement and does not require any modifications to your truck!


  • HSP Diesel LB7 3.5'' turbo inlet horn
  • (3) M6x1 replacement Hex bolts


  • LB7: 01-04 VIN Code 1


  • Increased Spool-up
  • Massive 3.5'' Inlet
  • Upgraded Hardware
  • Powder Coated
  • Great way to improve engine bay appearance

Additional Information

Additional Information

Cab Size No
Brand HSP Diesel

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