Description: and Features: Increase air-fuel ratio (about 25 percent ), power improvement (about 30 percent ) helps increase internal combustion rate by 80 percent , and can increase engine power by up to 40 percent . Reducing air pollution (at least 10 percent of Reduse CO) helps reduce the production of HC and CO that are not completely combusted. Significantly reduce noise and make walking more comfortable. Extend vehicle use and engine life, reduce power system problems, and extend maintenance intervals. Enhance sound tube suction to ensure idling and safety. The ability to increase the reaction, evaporation tube and TBI motor can bring the effect of MPI. Fuel economy only, other accessories demo in the picture is not included! Specification: Type: Fuel Economy Material: Stainless Steel Applications: Various types of steam (ceic) oil and gas engines for passenger and commercial vehicles Features: Fuel-saving device, Car modification, Improve power, Reduce pollution, Extend vehicle life, Auto parts Optional Dimension: 74-79: app.7.4-7.9cm or 2.91-3.11in 68-73: app.6.8-7.3cm or 2.68-2.87in 62-67: app.6.2-6.7cm or 2.44-2.64in 56-61: app.5.6-6.1cm or 2.2-2.4in 50-55: app.5-5.5cm or 1.97-2.17in Color: Silver Quantity: 1 Pc Note: 1.Please allow 0-1cm error due to manual measurement. pls make 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 x Fuel Economy Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.