821 vs 823 heads..HELP
#1
TECH Enthusiast
Thread Starter
821 vs 823 heads..HELP
whats the difference? and i ask because im about to buy a 6.2 from a supposebly 2010 denali but to my concern i thought all denalis had 823 heads but the motor there selling me has 821 heads..just wondering whats the difference and what trucks came out with the 821s..heres a pic of the motor
#7
TECH Fanatic
iTrader: (1)
This is the L92 intake
http://www.proheads.com/webshots/l92...92exteroir.jpg
and this is the LS3
http://image.motortrend.com/f/946272..._manifold+.jpg
http://www.proheads.com/webshots/l92...92exteroir.jpg
and this is the LS3
http://image.motortrend.com/f/946272..._manifold+.jpg