Anti-theft exhaust system for vehicles

An automotive anti-theft device comprising valve means disposed in the engine exhaust conduit intermediate the exhaust manifold and downstream noise suppression means and displaceable between a first position permitting exhaust gas flow therepast and a second position effectively precluding the flow of exhaust therepast to prevent engine operation;

• electrically operable valve actuating means for displacing said valve means intermediate said first and second positions;
• housing means enclosing said valve means and valve actuating means for impeding physical access thereto,
• means for remotely generating a multiplicity of different sequences of discrete electrical signals;
• means selectively responsive to a single predetermined sequence of said discrete electrical signals to energize said valve actuating means.