Elevate your Compatible with Harley Davidson Big Twin's power and refinement with the Compatible with Harley Davidson Roller Twin Cam Tappets Lifters Set—a precision-engineered upgrade for 1999-2016 unmodified Big Twin engines. Designed to replace OE tappets (OEM 18538-99C), these roller tappets enhance valve operation efficiency, unlocking hidden horsepower while reducing noise for a quieter, more responsive ride.

Why Choose These Tappets?
Power & Performance: The roller design minimizes friction and improves valve timing, boosting low-end torque and high-RPM horsepower—ideal for riders seeking a noticeable performance edge.
Quiet & Smooth Operation: Precision-machined surfaces ensure seamless contact with cams and hydraulic components
Built to Last: Made from Grade 20Cr alloy steel, these tappets resist wear, corrosion, and heat degradation, maintaining peak performance even after thousands of miles.
Universal Fit for Classic Harleys: Compatible with 1999-2016 Big Twin engines across popular models, including Dyna, Touring (Electra Glide, Road Glide), Fatboy, Heritage Softail, Sportster, and more
Easy Installation: Directly swaps with factory tappets—no special tools or modifications required. Simply remove the old tappets and install these for an instant upgrade
Compatible Models (1999-2016):
Blackline (2011-2013) / Breakout (2013-2016) / Cross Bones (2008-2011) / CVO (2014-2016) / Dyna (all years) / Touring (Electra Glide 1999-2016, Road Glide 1999-2016, etc.) / Fatboy (all years) / Heritage Softail (all years) / Iron 883 (2009-2016) / Night Train (2000-2009) / Softail (all years) / Sportster 1200/883 (all years) / Tri Glide (2009-2016) / Ultra Limited (2014-2016)

Product Specifications
Material: Grade 20Cr Alloy Structural Steel (body)
OEM Replacement: 18538-99C
Function: Replaces OE tappets to improve valve efficiency, boost horsepower, and reduce noise