You guys make a great product and most importantly have great customer service. Will definitely be recommending your product to my friends here and the local shops here.

Great customer service, but I don't do online instruction well. Thanks for answering your phone every time I called.

Put on my Sentinel and went down a 8% grade for over 7 miles and at the bottom of the hill my wife said, "Now I understand why you bought it". Worth every penny, it works great!

Hills or just helping slowing down. Love Mine!!!!!!!!!!!

I got it this morning, and got it put on and LOVE IT!

This exhaust brake is AWESOME!!!!!. I knew it would be…So simple, that’s why I love it. You’ve created the next wave of exhaust brake! Thanks

I got my Sentinel Exhaust Brake on my truck, and I will say this. I’ve never in my life felt the need to write a review on a product I’ve bought. I’ve bought many many parts over my lifetime for vehicles and equipment. But I felt the need on this one. I’m throughly impressed with this product you have built. It is extremely simple, fast to install, very well built and at a great price. Compared to all the other designs out there yours is the best design by far with its simplicity and sturdy design. My trailer and dozer are very heavy and the hills I pull around here are nothing short of truck killers. I can already tell a major difference going down…Barely touching the brakes. This is the very same hill that I juster melted down the motor in my truck with only 70K miles on it to give you an idea of the steepness. Well done!

I put one on a 2007 New Holland tractor, the only time I need tractor brakes is when I push the clutch.

Best upgrade I've done. Finally a simple, well thought out product. America is great!

I have a Sentinel Exhaust Brake. They are great!

My 2012 has this and after driving with it I would never have a pickup without an exhaust brake. Totally sold on this.

I have one on my '04 Dodge and it's AWESOME!

Exhaust brake still kicking ass!

Best sounding exhaust brake and it works better than I thought it would.

Installed my Sentinel Exhaust Brake a year ago, love it! It works great on my 2004 Dodge. Got my upgraded system, just need to install. Love the system.