My straight line was a bit noisy on my 1996 Dodge 3500. Bought it after some research. I just wanted to muffle the exhaust a bit. Arrived quickly and installed right after the downpipe. Worked great. It's really nice to scold and turn off the drone in the cockpit. But it only gets 4 stars because I removed the whistle from the turbine exhaust. I'll remove it soon but leave it in case the straight pipe and drone get too big in the future. (Haha)