DANX123
Expert
will the nytro benefit the way the apex did with these plugs?
cr10ek better throttle response was the main benefet i found?
cr10ek better throttle response was the main benefet i found?
deanhell
Extreme
I put 10's in my xtx about 200 miles ago and really can't tell any difference. It's possible they give a little more low end pull but it could just be my imagination. Ulmer's claim they got 1-2 hp gain when they dyno'd an xtx with 10's. For 24 bucks why not give it a shot 
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?marsh14
Expert
Do you have to gap them?
deanhell
Extreme
I bought them at a local speed shop and they said the plugs did not need to be gapped. The plugs are a 2 prong style so gapping isn't really an issue. That being said I checked mine anyhow and they were right on out of the box.
On a side note, the plug tool that came with the sled works great. Only took me about 20 minutes to change all 3. There was a fair amount of rust inside the plug boots. I used some di-electric grease on the plug caps and silicone spray on the O-rings of the boots.
On a side note, the plug tool that came with the sled works great. Only took me about 20 minutes to change all 3. There was a fair amount of rust inside the plug boots. I used some di-electric grease on the plug caps and silicone spray on the O-rings of the boots.
