I have 1993 1500 p/u and the air intake silencer was a big restriction. I ran several 1/4 mile tests and it was consistantly worth over a 1/10th on my warmed over zz4 with a flowed and programed TBI. You can go to GM and get a single corrigated tube that will pop in place of the silencer and the short corrigated section. If I remember correctly ask for the intake tube for a 1989 wt 2500 v8. If that doesn't work I have the part number somewhere and you can PM me. It also sounds better.
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Ted Rea
"Don't drive FASTER than your guardian angel can fly"
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