Did GM start putting the new style valves in LS1 engines in 1999 ??
01-28-2004, 06:00 AM
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Did GM start putting the new style valves in LS1 engines in 1999 ?? The 'back-cut' intake & the 'tulip' style valves... Did GM start using them in 1999 ?? Does anyone have 1999 heads that have the new style valves ??
Thanks,
Dave
Thanks,
Dave
