I'm in the market for some race plugs. I want to run 10s and 10.5s. Any suggestions as to where I can order some? I tried searching but no luck. Thanks in advance.

 

I get mine from Chris and Ari over at www.RX7.com ..... they just shipped me a set of Greddy 10.5s two day mail to arrive in time for the DGRR event

 

Thanks, that was a lot of help.

 

Im guess I have to call to place an order?? I didnt see them on the site.

edit: I only see the NGK ones under the "Power" label.

 

www.sparkplugs.com

 

Yeah, give them a ring. I like the NGK 7420s because they have a resistor and are full length spark plugs that take a normal socket.

AFAIK, sparkplugs.com doesnt sell them. I couldnt find them on the site anyway.

 

Compare prices with RHDJapan for the Greddy RE10's. They are just a re-badged NGK R7420, come in 9, 10 or 11 heat range.

 

im pretty sure mazdatrix also sells race plugs

 

How much did you end up paying for em if you don't mind me asking? I payed almost 160 I think..

 

sparkplugs.com has the NGK 6725s which is the platinum tipped model. They do not have the 7420 which is the iridium model and what Greddy is rebadging as their plug.

 

7420's for life..... or until they make something better haha...

 

If your un-baller like me advance auto parts can get b10EGVs for like 5 bucks a plug.

 

Advance (probably others as well) warranty their plugs. Save the receipt, foul them out, and take em back for a fresh set.

 

for 11.5 i get from a friend on ebay $120 a set. when i was using 10's i got them from napa for $34 a box set

 

I get mine from Advance Auto parts also.

 

You sure? They list them:

http://www.sparkplugs.com/results_app.asp?aaia=1433730

 

there on there..
http://www.sparkplugs.com/results_ap...1&AAIA=1192485

 

Bumping this thread as it appears prices are closer to $40 per plug on the R7420's now. Any one know of any deals or better prices out there.

Actually just found the place below at $33.

http://www.clubplug.net

 

B11EGV's for 4.50ea at advanced,..

 

How is the fitment of B11EGV's? I just ordered NGK 6725 10.5's from Banzai-Racing at $35 a piece.

 

The EGV series requires use of a milled down spark plug socket. They also have no integrated resistor.

As mentioned above about the NGK/Greddy: "I like the NGK 7420s because they have a resistor and are full length spark plugs that take a normal socket."

I've run them in the past but have decided to stick with the Greddy/NGK race series. A more expensive option but I feel it's more of the 'proper' plug. Good news too, I've put over 3000 miles on my most recent set (includes the DGRR trip) and the car starts, idles to temp, and drives fine with zero problems. This is with a set of 10s both L and T, I plan to switch to 10 L 10.5 T when this set starts to foul.

 

and what heat range is in your L % T right now?

 

10s in all four holes, I'll edit my previous post to make it more clear. These plugs also come gapped out of the box in my experience.

 

I am running the NGK 6725-105 (10.5's) in all 6 holes and they perform perfectly. No starting issues, idle, cruise and WOT all perfect.

I prefer these for similar reasons, they have resistors, no special socket required, and they are the correct length 21.5mm. Also, they are specified by NGK as rotary engine Race Plugs. Where as the EGV's are moped plugs.

NGK racing plug catalog page 3 http://www.ngksparkplugs.com/docs/racing_catalog.pdf

http://banzai-racing.com/store/93+_r...ark_plugs.html

 

MazdaMotorsports calls out a special thin washer that can be used with the R6725 to get the plug closer to the combustion chamber. Anyone have an NGK part number for the washer?