Car Chemistry 3DI22R CC Inserts-Insert 3 Disk Mufflers Fits 2 1/4 in. Dia. Pipe CC Inserts-Insert 3 Disk Mufflers

Just installed these on my 996 Porsche, replacing a set of 2 baffle versions. This new design is easy to install and gives a great sound for daily driving. The 2 baffle version allowed a bit too much noise for my taste (was difficult to hear a cell phone call on the highway). Have not measured the Db levels, but a nice increase over stock and half as much as 2 baffle versions. Note: I used welded on pre-sized inserts on both sets. Did not customize sound diameters that were provided in kit.

Put this in an after market exhaust for my arctic cat turbo sled. All I can say is the thing worked, drone gone, power still present, much quieter, love it.

Complete waste of money. Not only did it not quiet exhaust down, but it noticeably reduced power. I took it off after 2 days. Wish I could get my money back :(