Shop for Aftermarket Sterling Acterra Engine & Performance Parts Boost your truck 's power and efficiency with top-tier engine and performance parts for Class 8 rigs. Fuel Systems: FASS pumps for improved flow and better fuel delivery. Turbochargers: Options for engines like Cummins ISX and CAT 3406E to boost responsiveness. Exhaust Solutions: Mufflers, clamps, and flex pipes for a smoother, quieter ride. Diagnostic Tools: Monitor and optimize engine performance for better fuel economy and lower emissions. Built Tough: High-quality parts built to handle heavy-duty demands. Whether upgrading or fine-tuning your truck, this lineup has everything you need to take performance to the next level!