Description:OOTDTY and high qualityFeatures:Increase air- ratio (about 25%), power improvement (about 30%) helps increase internal combustion rate by 80%, and can increase engine power by up to 40%.Reducing air pollution (at least 10% of Reduse CO) helps reduce the production of HC and CO that are not completely combusted.Significantly reduce noise and e walking more comfortable. Extend vehicle use and engine life, reduce power system probl, and extend maintenance intervals.Enhance sound tube suction to ensure idling and safety. The ability to increase the reaction, eation tube and TBI motor can bring the effect of MPI.economy only, other acceories in the picture is not included!Specification:Type: EconomyMaterial: Stainle SteelApplications: Various types of steam (ceic) oil and engines for paenger and commercial vehiclesFeatures:-saving device, Car modification, Improve power, Reduce pollution, Extend vehicle life, Auto partsOptional Dimension:74-79: app.7.4~7.9cm/2.91~3.11in68-73: app.6.8~7.3cm/2.68~2.87in62-67: app.6.2~6.7cm/2.44~2.64in56-61: app.5.6~6.1cm/2.2~2.4in50-55: app.5~5.5cm/1.97~2.17inColor: SilverQuantity: 1 PcNote:1.Please allow 0-1cm error due to manual measurement. pls e sure you do not mind before you bid.2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package Includes:1 Pc Economy