01-10 Chevrolet/GMC LB7 LLY LBZ LMM Duramax Mega Filter Retrofit Kit Silk Satin Black HSP Diesel GM Avalanche/Escalade/Sierra/Sierra Limited/Silverado/Silverado LD From advanced safety backdowns that

From advanced safety backdowns that protect your engine under load

Improves flow of oxygen-rich air into cylinders

Pickups other than standard-cab long-bed or extended-cab short-bed require Exhaust Extension Kit

7L When used with 4R100 transmission

These stylish wheel-to-wheel steps offer a unique look for your vehicle

01-10 Chevrolet/GMC LB7 LLY LBZ LMM Duramax Mega Filter Retrofit Kit Silk Satin Black HSP Diesel GM Avalanche/Escalade/Sierra/Sierra Limited/Silverado/Silverado LD From advanced safety backdowns thatUpgrade your existing HSP 4. 5 inch intake with the HSP Mega Filter Retrofit Kit. This kit converts earlier PRIOR TO 3 12 2026 HSP intake systems to the latest square Mega Filter and aluminum heatshield box design, delivering improved airflow, increased filtration area, and easier serviceability. Why You Need the HSP Mega Filter Retrofit Kit The new square HSP Mega Filter flows approximately 10 percent more air than the previous round filter design