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well i was curious if upgradin my spark plugs to the Denso Iridium IK20 spark plugs was worth it. its like 12 bucks for 1 so for 4 plugs it comes around 50.00 and thats a lot. So does anybody have these in their car and is it worth it. i read its only good for forced induction cars, is that true ?? I'm actually considerin hookin up a 50shp of NX soon soooo ......

 
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My car runs a little smoother, but not $50 worth...

 
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ya.. thats not really considered an upgrade, save the 50 towards something else

 
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oh.. i forgot.. it sed it added 13hp and 9lbs of torque to a turboed 99 si

 
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I bought some new IK22's (1 step colder) off of TwilightX for something like $35. They're worth it at that price! I can now chirp 2nd at 6,000rpm instead of at 7,000rpm. A noticeable power increase after you drive around for a while... Better starts and smoother idle as well.

 
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i brought gap measurement at AutoZone to measure these gap i had...one of my denso ik20 is not .04 gap.....so do i really need all 4 in same cap, i means exact .04 gap factory spec, if one is not 0.04, so its still work fine right? also do you think is too early to upgrade my spark if my miledgae only 27,500.

thanks ur input

 
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well a buddy of mine told me that NGK's are better, and i should look into some of those

 
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I got mine free cause i sold 10 sets for a guy...but he sells them for 43 shipped

 
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are they better than the Denso iridiums. or should i just forget upgradin spark plugs

 
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I wouldn't upgrade the plugs, as they won't have any noticable effect. Maybe if you have a turbo...

 
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done !

 
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u installed them already?

 
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Same here. I changed to the Denso's at about 8000 miles on the odo, and immediately saw a difference. I was able to chirp 2nd the same as Grey (no other upgrades either) and my idle was alot smoother. It's just one of those things that some people put money in and some do not. My Jetta ran Bosch Platinums in it for the entire time I owned it and it ran fine. It's up to you what plugs you use, but I'm sticking with my Denso.

 
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yep i like my plugs i noticed a difference as well...people who say you dont notice a difference dont have aftermarket plugs wonder why they are telling you not to get them then...

 
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so which are better, densos or ngk, ive heard both??

 
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It doesn't matter, they are both about the same. And to let you know MIT, you are NOT SUPPOSED to gap Iridiums. They are pregapped. You can ruin the tip if you try to gap them.

 
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I have the NGK lazer platnimus, and they are great

 
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Grey & clownprice,
You're running the colder plugs on stock motors? I wanted to do that but was told not to (something about running the motor under daily driving conditions..)

 
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I redline constantly, so I should be all set. All you need to do is give them a little more heat to burn off the deposits. I'll check my plugs in a little while to check if they're allright. One step colder is not much anyway...