Thread: LS3 vs L99?
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Old 02-21-2009, 10:34 AM   #18
Grape Ape
Drives: 96 Bronco w/ a 5 speed
Join Date: Mar 2007
Location: PNW
Posts: 296
Originally Posted by THE EVIL TW1N View Post
Also, the L99 may have the same heads found on the L76, since that too has AFM. Although the castings are the same as the L92 heads, to save costs the L76 (and possibly the L99) has heavier solid valves vs. the lighter sodium filled L92/LS3 valves.
The AFM gear is in the block, not the heads.
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