If you could post photos of your present coils and the ones you are getting from Japan, that would be really groovy!

 

You're exactly right, and the fitment exclusivity theory definitely makes sense. It must simply be that there are so few of those ones out there now (assuming Denso no longer bothers producing those ones, or just VERY few), so supply and demand is in full effect.

Here's the fitment info for each:

Denso product pages:
673-2300 '00-'03 -- https://www.densoproducts.com/denso-...-ignition-coil (Discontinued)
673-2301 '04-'05 -- https://www.densoproducts.com/denso-...-ignition-coil
673-2304 '06-'08 -- https://www.densoproducts.com/denso-...-ignition-coil

Rock Auto for fun:
673-2301 -- https://www.rockauto.com/en/moreinfo...&pt=7060&jsn=3

 

Will do. The current pictures of my coils (original to the car-never replaced) are above. It is going to take at least a month for shipping as I don't need them right away and received an $80 discount in return from the company.
Mr Matchbox gave me the recommendations for this site (I have used other ones in Japan with good results) and he affirms it is a good company that has a stellar reputation. The reps assured me I am getting OEM Honda labeled parts, brand new. Here is the invoice.

The total of Yen 133,551 equals $858. I paid with a credit card in Yen to avoid bad exchange rates using dollars or PayPal. The Coils are Yen 22,355 which equates to $143.64.

Shipping with DHL is $53 but there is no sales tax which would have been $73 so I am ahead there.

1 JPY = .00643 USD

 

Looks like you are R&Ring your clutch, too? Good luck with both!

 

Don't forget tariffs... I bought and just received an audio mixer from the UK just a few days ago via DHL, and the tariff was dang high at 35% (tariff / item cost) + $17 broker/admin/disbursement fee.

I know UK tariff are supposed to be 10-15%... so idk why they tacked on more tariffs (probably parts/components used in it from China, irdk).


Also got slapped with a tariff for a cheap $5 (+$18 shipping) vinyl record from Japan. Media/informational/educational material are supposed to be exempt; but FedEx still added/slapped on an extra tariff code on top of the clearly duty-free tariff code on the invoice (which is illegal). Cheap tariff $1.05, but the broker fee is $17, making this record too expensive. I disputed it, despite their scare-tactics and extortion attempts of "may receive a $90-150 fee if we are not the cause."

 

I have all the other stuff, I just needed those so I thought I might as well combine. My flywheel should be fine.

 

You'll love the new clutch! Lighter feel, more positive friction point.

 

So... I had German Brand Herth+Buss Ignition coil with 1 rib, wich meassured around 1280 Ohm. (Herth + Buss are -THE- really trustworthy Aftermarkekt company for Japanese cars here in Germany.)

The NGK Nr. U 5099 wich are sold here in Europe have two Ribs = Looks exactly like the 06-09 Modells and meassure 980 Ohm. According to NGK europe Parts catalouge the fit all Modells of S2000. I hav asked NGK about the differences. Lets see if they Answer.

 

So maybe, per my lengthy speculation post, Honda indeed added resistance to 06-09 coils, for rfi interference with XM radio (and changed them for all markets, even if no XM, just so same parts everywhere).

Maybe, as part of that, they went from 980 ohms to 1250. So that would mean using newer 1250 coils on older cars = weaker, bad idea. But old coils newer cars, nbd if you don't have XM.

So maybe NGK knows this, so to keep their costs down, they just make coils per the older 980 spec, and say they work on all S. That will work perfectly in marketd that don't have XM. In markets that do, still fine except if car actually has XM, but since so rare, not something they care about enough to make coils with 1250 resistors.

 

What's bad about higher resistance coils?