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View Full Version : Bosch Platinum + s Vs Iridum Plugs

96gtcoupe
11-30-2003, 03:50 PM
Bosch Platinum 4's....Denso Or NGK Iridiums, which is better or do you prefer and why? I plan on picking them up an want to know which would serve our gts better, thanks in advance.
VanishingImage
11-30-2003, 07:01 PM
Im not 100% sure but i think for the average,the people here have the Bosch Platinums,but i think a few of the bunch have the NKG's but the most have the Bosch,but i cann't speak for everyone but im pretty sure its the Platinums have the more count here.I need to get some new ones,i haven't had them changed since ive gotten it back in Jan 02 and who knows if they are stock plugs or not.
Gimli
12-01-2003, 10:58 AM
A LOT of people have had problems with Bosch +2 and +4 plugs in the 3400 SFI.

I've never heard any complaints from Iridium owners (including me).
VanishingImage
12-01-2003, 01:53 PM
my mistake,i just knew a few people did have them tho,if they have had problems then go with the NGK's......Anyone kno how much those go for?
96gtcoupe
12-01-2003, 04:37 PM
Originally posted by Gimli
A LOT of people have had problems with Bosch +2 and +4 plugs in the 3400 SFI.

I've never heard any complaints from Iridium owners (including me).

hmmm, not good ,then being that I have the 3100, I may be in fo some probs too!
birdhouse
12-02-2003, 11:25 AM
I had the platinum +4 plugs in my old 3100, and i noticed an immediate increase in acceleration and a restoratin of life. That was also with a complete tune-up, bu still. Never did have a problem with the plugs... Had them in for over a year, too.
96gtcoupe
12-02-2003, 04:04 PM
Hmmm, thats a good note! Man, which to go with!
96gtcoupe
12-03-2003, 04:38 PM
Can I get a poll? All in favor of the bosch 4's or the ngk iridiums please let me know, thanks..alot of info on each side.
endsane
12-03-2003, 06:27 PM
I got the Bosch +4's...I got them about 4000 miles ago, I'd consider getting them, I noticed better accerlation and quicker starts.
96gtcoupe
12-03-2003, 06:37 PM
Originally posted by endsane
I got the Bosch +4's...I got them about 4000 miles ago, I'd consider getting them, I noticed better accerlation and quicker starts.

Cool ,thats good to hear. Was it hard to install them?
endsane
12-03-2003, 07:27 PM
Originally posted by 96gtcoupe
Cool ,thats good to hear. Was it hard to install them?

Not at all...but I have a 4cyl, you have the V6...still it shouldn't take more than 20 minutes.
96gtcoupe
12-03-2003, 10:33 PM
cool! tnx@
anteck7
12-06-2003, 12:55 PM
Get the stock ac delco plugs, its not worth the money for iridum plugs and +4 plugs just plain suck.
RaDiKaL
12-07-2003, 09:58 PM
Bosch +4 Plugs aren't very good. My friend put them in his car an Olds Cutlass Supreme with the 3100 MPFI and had to replace them all in less than 1000 miles.Also I work at a subaru dealership and we replace the +4 plugs alot because they are causing rough idle and performance issues. I wouldn't underestimate factory ac delco plugs either.
p8ntman442
12-07-2003, 11:32 PM
with many dis systems non resistive sparkplugs are no good, this means the +4's many engines will melt the tip off in under 1000 miles, however were talking 2 bucks each here so I say go for it, but if you experiance problems, dont be caught off gaurd.