Originally Posted by tonyb
What spark plugs are you using? I am at 31K on the odometer and need to replace the spark plugs but would like to put one step colder for the supercharger install.
From what I gathered for our Hemi's Eagle heads Mopar recommends NGK splzfr5c11 as factory replacement. One step colder iridium are ILZFR6D11 but they are too expensive. Is there a nickel / copper equivalent to ZFR6D11.
Also someone recommended Denso 3381. Has anyone used those or can confirm that they fit?
(for my 10' Hemi)
I just got my price from the local stealer-ship $7.41 ea for SPLZFR5C11 NGK's (Canadian$)
...I was told they will work fine for the Ripp Kit if re-gapped properly.
My original spark plugs only have 25k miles on them,
but if I have to pull them to re-gap them I may as well put new plugs in.
Still looking for a good local price on Denso 3381's part# K20HR-U11
The best online price I found so far is RockAuto for $2.93 ea ($46.88)
...but shipping is almost $30 to Canada