Was as descripted, and ift perfectly

i am very pleased with the air filter it works good

Easy install great quality. Comes with everything you need. Took maybe 10 minutes to take the old assembly out and install this kit. Sounds great and the retirement is big enough for a Mack truck. Very satisfied

Fits great good quality clamp and pipe and man it makes some beautiful noises.

This 6637 Kit with the Donaldson Blue Filter, is the most straight forward, affordable, quality improvement I have installed to date. The results were instantly noticeable the first time I started the truck and headed up our steep dirt driveway. Throttle response is immediate and increased power is phenomenal. Pulling out onto the highway the increased power literally put us back in our seats. Most importantly there is no more lag and the available power makes the truck feel much safer to drive. I stay with Clay because the true value is not just quality and price, but the service before and after the sale. Clay is the most honest, thoughtful, business man I have ever dealt with, providing top quality products, often times within two days, at prices competitive with everyone else in the industry.

Great kit, i love the fact they included a new clamp. Installation was pretty easy did not have to do any cutting of the old filter box to get it to fit.

Anything that simplifies the truck while improving air flow, dirt capacity, and turbo spool up times is a great product. Cant beat it for the price

Wanted to replace stock air box. Replaced with the kit
Easy install less than 10 minutes fits great.

Easy install! Works great can actually hear the turbo now.