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The 4.8 and 5.3 have the same head. I believe there are two casting numbers: 852 and 706
I got a 2001 Sierra with the 4.8 .. Are the heads the same as the 5.3 ?? What is the casting numbers??
The 4.8 and 5.3 have the same head. I believe there are two casting numbers: 852 and 706
02 Silverado
02 TrailBlazer
Thanks man!! I am thinking about getting an Ls1 for my truck and wnated to know if I used the haeds if it would raise the compression...
It will raise your compression with 5.3 heads on a 5.7 but I think the valves are smaller than the LS1 heads. Mine are casting no 241 and I think the LS6 heads are no 243.
2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).
1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning
Yea, it will raise the compression close to 10:8.Originally posted by Jammin Joel@Oct 15 2003, 11:03 AM
Thanks man!! I am thinking about getting an Ls1 for my truck and wnated to know if I used the haeds if it would raise the compression...
Yea, it will raise the compression close to 10:8.
02 Silverado
02 TrailBlazer
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