jaber911

these heads will fit on a stock LQ4 motor???
The cylinder heads come standard using the factory GM 2.165" intake -!!
and 1.59" exhaust valves
chamber sizes from 67cc to 72cc

Intake Flow in CFM


.200" Lift -- 154
.300" Lift -- 223
.400" Lift -- 282
.500" Lift -- 323
.600" Lift -- 349
.650" Lift -- 356

Exhaust Flow in CFM


.200" Lift -- 115
.300" Lift -- 176
.400" Lift -- 202
.500" Lift -- 213
.600" Lift -- 224

Precision Race Components CNC-Ported LS3 & L92 Heads or
AFR 205 66cc
what the best ??


thanks

Sales4@Texas-Speed

iTrader: (4)

The L92 heads will fit on that motor because it is a 4.00" bore block. You will be required to get the l76 or l92 intake manifold depending on what vehicle the motor is in. Depending on the year you would also be required to grab some different fuel rails and injectors. As far as determining which type of head would be better really depends on what you are doing with the vehicle. For a drag race type setup they would work well because you will pick up a lot of top end power, for more of a street car they would not do as well because of the large valve size and runner size. At that point it might be better to look into something like the PRC 215s or AFR 205s.