jsmoriss

So E366 is the correct part number?

What's the suggested gap for our engine?

Thanks,
js.

RedneckJeep

Actually it says on the box that they do not require gapping, so there is no spec.

Atl JK

Yeah, they'd probably be a bitch to gap.

VINdecent

Hoping to hear more feedback on this. Especially someone with hypertech tuned to premium fuel...

RedneckJeep

I unhooked the trailer and I can REALLY tell a difference. I never wouldda thought plugs would make a difference like this. I've tried Split FIres in race cars before and did notice a difference on time slips, but I couldn't feel anything. My wife and son can even tell just riding in it.

JK07

can someone confirm the exact part number please.

checked summ raccing they are showing E3-66 for 5.1/6.1L motors????

RedneckJeep

E#66 is the right number. I've already confirmed it once, how many times do you need?

RedneckJeep

"Pre gapped" could imply there's a spec, when there's not. That's all I was sayin. I mean....I'm sure there probably is a spec, but it's not a user friendly one.

sixt7gt350

Installed today.
No noticeable difference in accel or dash-indicated MPG.
It actually downshifted sooner on slight hills than it did before.

I'll watch MPG over the next few tanks.

RedneckJeep

Now stop and think about that. If the engine was putting out a touch more power, it could make that happen. Just the same as you stepping your foot down to make a little more power and force the downshift.