Here's a similar thread on a diesel forum, they for the most part don't like them.

http://www.4btswaps.com/forum/showt...d&s=33f88590020243d2347b6c5705224065

I think a good properly sized paper filter is a better choice. I have used some K&N filters but found no advantage, don't care for the risk, and won't use any in the future.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-