Re: What HP is really in the 91 Silverado 350/5.7 engine.
Throttle body spacer (AIRRAID, for example) is legitimate. Don't even think about using a Tornado device. It's all hype, to me. It sounds logical, but it didn't work when I tried it out. Good thing it had a 30-day money-back warranty. I was driving enough to do a good test of it, too.
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Member Nr. 2770
'96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed.
'69 C-10 SWB; 350/TH400 - in limbo
The older I get, the better I was.
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