psmbuick System
The "psmbuick" system is built by Performance Systems Mfg. , LLC of Golden, CO. I talked with the guy that builds this system at this years May Madness. He did a LOT of testing in the mountain passes of CO with this system & others and had some good arguments for his product backed up by documentation. If I'm not mistaken, he used a drop-in AFE PG-7 filter for his testing.
He said his testing showed that some of the aftermarket air intake systems actually caused you to lose some power, whereas, his showed an improvement.
I have an AFE PG-7 Air Intake System on my '03 & performed an oil sample test at the last oil change. My Duramax buddy, citing the Spicer AF Test, recommended removing the AFE & going back to the stock set-up. I was curious just how much silicon (dirt) was getting into the oil.
I live in Phoenix, AZ (dusty, desert environment) & ran Chevron Delo-400 15X40 for 8303 miles at which time I changed it & the Fleetguard oil filter. The bottm line was that the silicon level was at 5, with the recommendation that "No Action Required", "NO PROBLEMS PRESENTLY ASSOCIATED WITH THIS SAMPLE. CONTINUE SAMPLING AT THE NORMAL INTERVAL. " The test was done at Empire Fluids Lab, a division of Caterpillar, Empire Southwest, LLC.
After receiving the results, I went down & talked to them, just to verify the results & they, again, said that a silicon level of 5 was fine.
With the results of this testing, I feel more comfortable with the use of the AFE PG-7.
Hope this helps.
Joe F. (Buffalo)