01-04.5 Duramax LB7
This is the high flow 3.5" Turbo horn for LB7 Duramax
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 without putting a small dent on the turbo horn
Comes ready to install with new bolts!
QUESTIONS & ANSWERSAsk a Question
Is there a gasket to replace when installing?
There is a gasket, sometimes you can reuse old gasket, most guys just use a little rtv silicone sealant.