Air intake pipe for a motor vehicle

An air intake pipe (30) includes a downstream pipe (32), an upstream pipe (33) and a flexible fit pipe (31). The downstream pipe (32) has one end connectable with the air intake end of an engine, and the upstream pipe (33) has one end connected with an air filter. The downstream pipe (32) and the upstream pipe (33) each have the other end movably fitted with the flexible fit pipe (31). The downstream pipe (32) has a smaller diameter than the upstream pipe (33) in order to increase the intake and pressure of air. The rotatable fit structure between the flexible fit pipe (31) the downstream pipe (32) and the upstream pipe (33), and the flexibility of the flexible fit pipe (31) enable the air intake pipe to be installed in various engine spaces of different automobiles.