01-04.5 Duramax LB7
This is the high flow 3.5" Turbo horn for LB7 Duramax from HSP Diesel.
Adds 15+Horsepower, faster spool up, lower egt's, more Turbo whistle.
Stock horn is only 2-3/8", This is 3-1/2" that is a huge increase in airflow!
Does not fit CA Smog Package Trucks.
Comes ready to install with new bolts!
Comes powder coated your choice of color.