Product material: aluminum alloy
Applicable models: Universal
Product packaging: self-sealing bag packaging
Product main function:
S size is suitable for 1.0-1.6 displacement
M size is suitable for 1.6-2.0 displacement
L size is suitable for 2.0-2.4 displacement
XL size is suitable for displacement above 2.4
The length of the product is only the length of the whistle, excluding the length of the fixing frame.
About size selection: / Please first / Please measure the inner diameter of the exhaust pipe of your car,
 Compare with the size in the picture below to see which one fits your car;
 On the premise that the installation size is suitable, try to choose a larger size.
 Sound similarity: The sound of the turbo relief valve is generally "zi, zi". And this whistle makes a "shh, hush" sound, which is more inclined to the kind of whistle we play every day. After all, it is a few pieces of sound emulator, it is technically impossible to imitate the same as the one, only so