can i order than from a regular parts store like autozone? whats the part number?

 

I'd try rockauto first. www.rockauto.com best prices and they can get pretty much anything.

 

part number depends on which plug you want, they have different heat ranges. 10, 10.5 and 11, they used to have 13 too.



NGK 6725-10, NGK 6725-10.5, NGK 6725-115



i think summit and places like that stock it by the other number

 

http://store.summitracing.com/partdetail.a...mp;autoview=sku



meh price went up, again...

 

anyone find em cheaper than 33.82?

 

http://www.rx7.com/store/rx7/fcignition.html



$28.95

 

I think Dave Gibson was selling a few boxes a few days ago, his price was below what I get them for wholesale from Japan.

 

do you actually NEED race plugs



cause all ngk plugs have the "R" on them... even the regular ones you can buy at pepboys...

 

well, after some research i decided against them. i seen people gain 9-10 whp from stock NGK's to the R's. but they tend to foul out quickly for daily driving and have trouble with hot starts.



atleast i read that a few places...

 

They will outlast stock plugs by a factor of 3 even with an ignition amp. You can index them to spark towards the approaching charge, they do make more hp than stock plugs, a little more safe advance can be had, I tested it on my own dyno. As for fouling on street cars, never had it happen, and I run 10.5's on my n/a p-port, 11.5's on my TII. Getting rid of the junk aftermarket apex seals, got rid of my hot start problems.....