PDI BIG BOSS™ CUMMINS X15 CAMSHAFT | 3690406 CAT Cylinder Head Fits most 20"

Fits most 20"

a 20% air flow increase over a stock manifold

Big Boss performance radiators for Peterbilt 389 models feature a dimpled tube design to allow coolant more time to cool properly for more demanding applications

This is called edge buffing and the method is often used when polishing metal with an angle grinder

PDI BIG BOSS™ CUMMINS X15 CAMSHAFT | 3690406 CAT Cylinder Head Fits most 20"Available for: Cummins X15 2017 2021 Key Benefits Made from all new material Trusted Quality No core charge Direct OEM replacement Made in the USA Warranty: 1 Year Unlimited Mile Warranty Features: Our premium grade, high quality camshafts, specifically designed for Cummins X15 Common Rail engines. Engineered with precision and crafted from the finest materials, our camshafts are the standard of performance and durability. We believe in providing only