100 times better than stock. Stock air box and filter have the possibility of leaking around the filter. Easy to install the 6637 and sounds amazing too, remove stock air box and this will fill in the void perfectly. When buying this keep in mind that you need a 4 inch piece of tube to connect it to your turbo intake hose. I used 4 inch exhaust that was about 5 inch long. The filter seals perfectly around the material without clamps too.

Great product

Fits great, good upgrade over stock, wakes truck up,

Fit right in and works good.

Great product for price

Great air filter surface volume. Their filter kit is great as well. I usually cut the pipe a little short if using the stock outlet hose from the filter to the ccv ring.

I replaced my spectra cold air intake with this filter,tired of maintaining and oiling,,this filter is an improvement,will continue to use this filter think engine breathes better,easy install with a 4in.exaust pipe which local shop gave me..will continue to buy parts from riffraff.

Purchased this filter for my Ford F250 for years. Unfortunately I sent this order back because my truck was totaled.

Good product, much better than stock on my 97 f250 PS.