01-04 Duramax LB7 Fleece Modified Turbo Horn Compound Level 4: 80 HP &

Level 4: 80 HP & 200 lb-ft

This kit can safely support 750HP to over 1000HP depending on turbo and fueling configuration

2 Year Powertrain Warranty

Typical aftermarket exhaust manifold bolts are much shorter than stock which after numerous heat cycles can cause them to fatigue and start to stretch

01-04 Duramax LB7 Fleece Modified Turbo Horn Compound Level 4: 80 HP &Increase your LB7s potential with this simple, but effective upgrade. Back to back dyno pulls showed an increase of 15hp with this Fleece Performance Modified LB7 Intake Horn thats about the cheapest 15hp from a bolt on youll find anywhere! Painted black with a Fleece logo, includes a new Mahle gasket, B32478.