LQ9-flat top pistons=more compression
LQ4-dished pistons
There are other minor things but that's the main difference. Older LQ4's had weaker rods but they fixed that in (i think) 04.
LQ9-flat top pistons=more compression
LQ4-dished pistons
There are other minor things but that's the main difference. Older LQ4's had weaker rods but they fixed that in (i think) 04.
99 Silverado 1500 4X4- 6.0 LQ4, LPP headers
00 Trans Am- H/C LS6 intake, 100 shot
11.64@121 w/1.74 60' @4400' elevation
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