I just purchased a 69 camaro with a 350, longtube headers, and stock exhaust. I wanted hear my car rumble so I installed a 40 series flowmaster dual exhaust with an X-pipe and used 2.5" pipes. When I turned it on I was very disappointed because it was nowhere near as loud as I expected it. Honestly it sounds very quiet for a muscle car with headers, yet the engine sounds very healthy and the air that comes out of the exhaust tips comes out with a lot of pressure. I don't know what to do to it to make it sound loud. Please help!