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Old 03-20-2007, 03:36 PM
sy733 sy733 is offline
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stock syclone heads (LB4's) are a totally different chamber design than the 96+ (vortec) heads. The 96+ heads have a kidney bean shaped fast burn chamber.

1993-1995 non syclone/typhoon heads (L35's) are a direct bolt on head for the syclone and owners have reported measurable increases in power after installing them.

I run 1996+ heads on my syclone with a stock intake. In order to pull that off, I had to redrill the vortec heads for my syclone lower intake bolt pattern. Also, I added material to the lower intake the machined the welds and port match in order to seal the taller vortec head intake ports. I'll see if I can dig up some pics of this.
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