spark plugs
Administrator
Joined: Mar 2001
Posts: 367,963
Likes: 24,705
From: In a parallel universe. Currently own 2014 Stingray Coupe.
C7 of the Year - Modified Finalist 2021
MO Events Coordinator
St. Jude Co-Organizer
St. Jude Donor '03 thru '25
NCM Sinkhole Donor
CI 5, 8 & 11 Veteran
AC Delco Iridiums have always worked well for me.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
++1 on the Iridium's
Unless you are Forced Induction or running in excess of 500 Non forced induction power, STOCK OEM Iridium's are excellent. After approx. 500 Hp, there are better aftermarket plugs that perform better in that application.
NOTE!!!
Fancy HIGH DOLLAR Plugs and Wires will NOT make more HP on a stock OEM engine than you already have! PERIOD!
If you need wires, the GM Performance RED wires make an excellent replacement wire as they are very reliable and fit properly on the plugs and coils.
Unless you are Forced Induction or running in excess of 500 Non forced induction power, STOCK OEM Iridium's are excellent. After approx. 500 Hp, there are better aftermarket plugs that perform better in that application.
NOTE!!!
Fancy HIGH DOLLAR Plugs and Wires will NOT make more HP on a stock OEM engine than you already have! PERIOD!
If you need wires, the GM Performance RED wires make an excellent replacement wire as they are very reliable and fit properly on the plugs and coils.
Last edited by Bill Curlee; Mar 2, 2017 at 11:20 AM.
