Flex truck? If it is get the regular non flex plugs. Truck will run just fine if you use regular gasI have ngk ir dilfr5a11d original in engine. Wow!!!these are expensive! $18 each!
Can i use a less expensive plug without effecting performance?
Any suggestions on a replacement?
You got me digging now...Do u mean flex fuel truck? No, mine isnt. I run it on reg gas