Throttle Body Spacer | Chevy Silverado & Gmc Sierra 1500 2Wd/4Wd (1999-2006 & Classic) | Rough Country'S Throttle Body Spacer Helps You Get The Most Out Of Your 99-06 Gm 1500. Engineered With A Spiraling Helix Design, Our Durable, Aluminum Spacer Forces Incoming Air Into A High Velocity Vortex That Aids In A More Powerful And Efficient Fuel Combustion Process. This Process Offers Improved Torque Performance And Increased Fuel Economy. Includes An Oem Style Rubber O-Ring Gasket, Superior To Paper Gaskets Found In Inferior Kits. Best Of All, This Modification Is Easy To Install Using A 100% Bolt-On Installation Process That Can Be Attached In No Time! Works With Multiple Engine Sizes: 4.8L/5.3L/6.0L. | 2.5 | 5.75 | 14 | 2.00Lbs | Rough Country | 1196