Haven't noticed and added horsepower but is worth the money for a quieter ride. Took almost all of the engine noise away.

97 7.3 I installed this item after baby swamps and ts6 chip. I noticed some better throttle response and some what less noisy I didn't discover the difference until I put my foot in it and well a smile came across my face well enough said buy your own and get your smile

Definitely made the idle quiet down a little and smoothed it out as well. 10 out of 10 would tel everyone to get this!

Easy to install. Doesn't quiet the engine down completely but takes a good bit of the clattering ouout.

Very easy install. Some say you need to remove the y-pipe? Not the case in my pickup. Installed in about 30 mins. Fit like it belonged there from the factory!

Made the truck a lot quieter, idle is way better.
LOOKS SUPER COOL
Some install instructions would be great.
You must remove Y pipe to install.
Install the fittings 1st, then the pipe.
No torque specification.

If you are getting this thinking you will see a difference, well you are right. It for sure idles better and seems to help smooth start ups a bit. Throttle response seems a lot better too. I did mine more to help out the overall running of the truck and help the sensors see better and equal pressure. You may not see a huge "seat of the pants" difference but if definitely will help. Install was less than 10 mins.

One install note: I had to move one of my high pressure oil lines that was running right in front of the bolt I needed. I simply loosed the nut on the engine itself and then was able to put a wrench on the line and turn it slightly and it moved the line out of the way.

7.3 should have came from the factory with this. Installed in less than 10 mins. It quiets truck idleing and cruising at highway speed. Throttle response I a lot better.

Idle's better and a notable improvement in throttle response. Thanks guys!!