A leaking exhaust system can significantly hurt your gas mileage if the leak is located before the oxygen sensors. Fresh air enters the exhaust, tricking the O2 sensors into reading a "lean" mixture. This forces the engine to burn more fuel. Symptoms include loud noises, smells, and poor MPG.
A downpipe connects a vehicle's turbocharger to its exhaust system. Upgrading from a restrictive stock pipe to an aftermarket catted or catless version reduces backpressure, allowing the turbo to spool faster for more horsepower and aggressive sound. Proper ECU tuning is required after upgrading.
A damaged car exhaust system does more than just make your engine loud; it impacts safety, fuel economy, and performance. This guide covers the top 10 warning signs of exhaust trouble, from rattling noises and raw gas smells to sluggish acceleration, so you know exactly when to seek repairs.
