X2 SERIES LED PERFORMANCE BULB FOR H13-99131 2017-66-duramax FASS Whisper Technology (FWT) was

FASS Whisper Technology (FWT) was engineered to meet the stringent demands of  today’s quiet diesel engines

Important Note: The S&B Replacement Fuel Tank won't fit vehcles with a 2 piece driveline

Requires Chevrolet

sticky residue that builds up inside diesel HEUI injectors over time

Silverado 1500/2500/3500

X2 SERIES LED PERFORMANCE BULB FOR H13-99131 2017-66-duramax FASS Whisper Technology (FWT) wasGo Performances New X2 Series LED Headlight Bulbs are the brightest LED headlights on the market. The powerful LEDs provide over 10000 lumens output, 3 times more than standard halogen bulbs. The State of Art optic design provides a precise beam pattern with a defined cut line to avoid glare. The most focused hotspot than any other LED bulbs giving you the longest range of visibility on the road. Illuminating your driving at night, X2 LED Performance