Re: Horsepower difference ?
improved intake port alignment. Bit better heads and cams, improved exhaust and header/cats.
405 hp blocks also had 4 bolt mains and all of them were made in 1993
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95 390 LPE ZR1 (505 rwhp)
LSV = Lingenfelter Super Vette
Twin Turbo 2003 Z06 (800 RWHP)
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