bbirdwell

As the title says, I do not recommend the Champion 7975 double-platinum spark plugs. I installed them gapped at ~0.040" and 35,000 miles later, the electrodes had eroded to ~0.058" to 0.060". I strongly suspect this was the reason for the failure of cylinder #1 a few weeks ago as the gap on those two plugs was > 0.060". I bought 16 on sale and with rebate for $41; now it doesn't seem worth the money I saved.

Yesterday I installed a set of the Bosch FR6MPP332 spark plugs (in 2 1/4 hours) gapped at ~ 0.034". Cost was $120 for a set of 16.

FWIW, the factory installed plugs made it ~90,000 miles with no issues.

The photo shows a typical gap of the plugs I removed from the car versus the Bosch gap new.

hachiroku

my friends have blown many of these plugs up. they do not work for anything that makes more than 100hp.

tw2

Are those the factory plugs you replaced them with? Has anyone tried the brisk silver?

GatorMB

Champion plugs are good for lawnmowers and 4 cylinder Chrysler. Chevy same difference.

Stick with Nipiondenso, Bosch, NGK.

Cheers

RN12YC will not fit the chevy sorry