I dont know anything about flow numbers or porting but those numbers seem high to me. I got this from AI's webpage
"Typical gains for our CNC work are in the 20-30rwhp SAE range over the as cast 241"
Those numbers seem more inline to me, but I know zero about porting.
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1999 Z28 Camaro|Cut up
2003 CC Duramax Dually|19.5 w/245/70/19.5|5in exhaust
2009 G8 GT 408hp/402tq sae|Rotofab CAI|LS9 Cam|Headers|GXP Mufflers|Custom System
2009 Tahoe stock
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