I got a 2001 Sierra with the 4.8 .. Are the heads the same as the 5.3 ?? What is the casting numbers??
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.
2006 Superior Blue Trailblazer SS AWD, Stock as a rock
Sold: 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).
Sold: 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
Posting Permissions
Reply With Quote
