question; fuel rails

[ronbros999]

what year did GM start putting composite plastic fuel rails on truck 6.0L???

or was that for Flexfuel engines?

Ron

 

[BMF_Racing]

All of my truck intakes 1999 - 2006 had plastic rails (none of the 25 or so engines I've had have been flex fuel models). Pretty sure they all did have pastic until 2009 when they switched to the rect port L92/L76/Ls3 style runners (those had metal rails).

 

[Chuck Leeper]

My 05 LQ4 has plastic. The 07 in the Escalade is stainless rect.