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If it's the stock TPI setup it will NEVER make those kinds of power numbers n/a. The stock plenum, runners, and intake start choking for air around 3,800 rpm or so...and definitely a wall at around 5,000.
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--==RPM Resto & Custom==--
1989 IROC-Z Media Coverage:
Chevy High Performance - Readers Rides 4/03
GM High Tech Performance - Tech Article 3/06
Chevy Rumble - Tech & Feature Articles November 2006
Auto Restorer Magazine - Feature Article 5/11
SkinAndSteel.com
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