Impala Catback Exhaust

It incorporates an exclusive whisper resonator and three-chamber straight-through mufflers, balancing a quiet operation with high flow characteristics. Installation is straightforward, utilizing a clamp-in and bolt-on design that requires no welding and includes all necessary hangers. The 2.5-inch version directly fits stock downpipe flanges or aftermarket downpipes with a 2.5-inch exit. For the 3-inch version, a downpipe with a 3-inch exit flange is required. This cat-back exhaust is specifically designed for 2000-2005 Impala dual exhaust models, and also fits 1997-2003 Pontiac Grand Prix models with the 3.8L engine, including both supercharged and naturally aspirated variants. ZZP claims this system is superior to competitors like Magnaflow, citing their use of MIG welding and lack of chambered mufflers/resonators as reasons why Magnaflow systems can be too loud. Years of research and development have gone into creating this "ultimate exhaust at a reasonable price" by a company considered the leader in the 3800 Series II and III market.