Airaid 02-09 Chevy Trailblazer / GMC Envoy 4.2L PowerAid TB Spacer Exhaust- Mufflers & Tips>X Pipes while each kit has upper

while each kit has upper and lower roll plates to protect the air springs from sharp edges

Dual 4" Polished Tips: Finishing off this system are dual 4" diameter

Offering economically-priced

Air Lift 1000 Universal air springs can improve all aspects of your ride

Adding air springs will eliminate many common issues faced when towing and hauling heavy loads

Airaid 02-09 Chevy Trailblazer / GMC Envoy 4.2L PowerAid TB Spacer Exhaust- Mufflers & Tips>X Pipes while each kit has upperThe POWERAID Throttle Body Spacer is designed to enhance off idle torque from 800 rpm to approximately 3,000 rpm. The spacer utilizes it's unique, patented Helix Bore design to spin the incoming air charge as it passes through the throttle body spacer. The spinning air action boosts the velocity of the incoming air and contributes to better atomization of the air fuel mixture as the air charge enters the combustion chamber. The end result is more part