Does anyone know the equivalent of a NGK 6725-105 in any of the following?

- Blitz
- Greddy
- HKS
- SARD
- ZEX

I'm only using race plugs and I know the above brands all sell them. I was just wondering if anyone knew the equivalent of the NGK's..Had any experience with anything else etc.. I'd like to try something different but don't want anything of lesser quality or output... If nothing else comes up...i'll just order the NGK's again.. but at 35 bucks a piece.. yikes haha. Thanks!! All input welcome!!

 

Greddy's version of the NGK race plugs is the R7420, not the 6725, and is supposedly better than the 6725's. They're called the RE-9, RE-10, and RE-11. They are cheaper than the NGK brand, but they are not cheap!

Some more info here: https://www.rx7club.com/showthread.p...ght=r7420+6725

Not sure if anyone else re-badges the 6725's...

 

Hks are rebadged densos cant remember the part numbers though, i posted them in a thread in the the third gen section.

 

Just called THmotorsports... the guy told me I should just use stock plugs...... He said they work just fine... but they don't last long. Which in my opinion is prob why they don't last long. Either way...anyone know anywhere else I can order Greddy r7420's

 

meh, I haven't had any trouble with the stock plugs

 

Here is a IRE01-31. The Denso equivalent to the NGK R7420-10.

You can get them at Advanced Auto for about $32 ea.

HKS supposedly rebadges them.

Barry

 

whats your set-up? how much power are you making? thanks!