Installer Series Cat-Back Exhaust System by MBRP. Series Installer Series Exhaust Pipe Material Aluminized Steel. Exhaust Type Cat-Back. Main Piping Diameter 3. Muffler Sound Mild Tone. Exit Location Dual Center Outlet Exit. With Exhaust Tip. Tip Outlet Diameter 4. CARB Compliant Yes. The Installer Series from MBRP brings you the best in high-quality construction these reasonably-priced systems are manufactured on the same tooling and with the same processes as MBRP's Pro Series stainless steel cat-back systems, but from a far less expensive industry-standard aluminized steel.You can expect these aluminized steel pipes and mufflers to fit just as precisely, and to deliver the exact same compelling sound and performance increases as the Pro Series at a substantially reduced cost. The first thing you'll notice will be the rich, mellow sound delivered by the chambered muffler. The second thing you'll notice is the improved performance as lowered backpressure and improved scavenging let your engine deliver more power and torque. The third thing you'll notice is more money in your pocket after you fill up.MBRP's performance exhaust systems are built to perform. Every system has been built to the most exacting standards in the industry. MBRP systems are as much fun to install as to drive with on your muscle car. Bolt-on, no weld design makes installation a no hassle one and a half to two hour project. Everything is direct fit to the OEM hangers and you get all the clamps and parts you will need, all in one box.With all the tubing mandrel-bent without reducing its cross-section, and every bend made to the minimum bend angle, MBRP exhaust systems can substantially reduce backpressure through the system. You don't need to expend horsepower forcing exhaust gases through a pinhole, and improved scavenging of those same gases means more mixture drawn into the cylinders for more p