[68c10airstream]

Along the lines of your so-called cold air intake a friend installed a so-called cold air intake on his duramax diesel and he said it was noticeably slower under load in hot summer temps. I found a stock layout duramax and found that they pull air from the inner fender for cool air but more importantly it being shielded from water intrusion (would destroy a diesel engine from hydraulic lock). His so-called cold air intake pulled under hood hot air into one of those crappy open element window screen oiled air filter. I bet the small debris his duramax engine is chewing on doesn't help longevity much!!

I have since looked at many aftermarket so-called cold air intake systems and hence my ls 68c10 doesn't breath through one of them.