862 heads?
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862 heads?
I just found a 5.3 in the local bone yard. It has the 862 heads on it and was just wondering if these are the ones that flow the same as the 243 heads. Please someone let me know ASAP. Thanks guys.
#2
Re: 862 heads?
Casting Number 706 and 862
Head: 1999+ 4.8L / 5.3 Liter Truck
Material: Aluminimum
Part Number:
12559862
12561706
Combustion Chamber Volume: 61.15cc
Compression Ratio: 9.5:1
Intake Port Volume: 200cc
Exhaust Port Volume: 70cc
Intake Valve Diameter: 1.89 inches
Exhaust Valve Diameter: 1.55 inches
Stock Head Flow Numbers
Chamber 61.15 cc----0.100--0.200--0.300-- 0.400--0.500---0.550---0.600
Intake 200 cc----------63 ---128----179-----210----218----221-----226
Exhaust 70 cc----------54 -- 93 ----121----145-----163----168----174
Casting Number 243
Head: 2001 LS6 5.7 Liter Passenger Car
Material: Aluminimum
Part Number:
12564243
Combustion Chamber Volume: 64.45cc
Compression Ratio: 10.5:1
Intake Port Volume: 210cc
Exhaust Port Volume: 75cc
Intake Valve Diameter: 2.00 inches
Exhaust Valve Diameter: 1.55 inches
Stock Head Flow Numbers
Chamber 64.45 cc-------0.100---0.200--0.300--0.400---0.500---0.550---0.600
Intake 210 cc------------62------126----184----224-----251----256----257
Exhaust 75 cc------------57------108----143----163-----176----180----183
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Re: 862 heads?
^ There you go, basic 4.8/5.3 heads
799 (243) heads only came on aluminum 5.3's and GEN IV 4.8/5.3's. 243's are exclusive to LS2/6's
If the engine is a decent price, you should still grab the drivetrain regardless of head type
799 (243) heads only came on aluminum 5.3's and GEN IV 4.8/5.3's. 243's are exclusive to LS2/6's
If the engine is a decent price, you should still grab the drivetrain regardless of head type
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