Product details Exhaust Pipe Soer Oversized Roar Maker Simulator Car Turbo So Auto Loud Whistle Modified Turbine Aluminum Tailpipe Valve So Wave Fried Street (RED/M) Small size/applicable displacement: 1.1-1.6 applicable exhaust pipe diameter: 32-43 mm Medium/applicable displacement: 1.6-2.0 Applicable exhaust pipe diameter: 37-48mm Large size/Applicable displacement: 2.0-2.4 Applicable exhaust pipe diameter: 44-55 mm Extra size/Applicable displacement: 2.4 and above Applicable exhaust pipe diameter: 56-85 Regarding size selection: please measure the inner diameter of the exhaust pipe of your car first, and compare the size in the figure below to choose the right one the size of. er the premise that the nucleus is suitable, try to choose a large one So similarity: The so of a real turbo relief valve is usually ", " so, but this whistle makes a "Shhhhh" so It is biased towards the mouth whistle that we play every day. After all, it is a few pieces of imitator, technically it cannot be imitated to be the same as the real one, that's all. Size: special car Weight: 67g/85g/100g/120g Color: Silver Material: aluminum alloy Quantity: 1pcs Package package: 1 car imitation whistle