I bought some Denso spark plugs on a visit to the US some while ago, checking at the time these were correct for my '98 GS300.

The part number is not the same as those shown on the Denso website catalogue and I want to be sure before getting my guy to fit them.

The part I have bought (6-off) is FK20HBR11. Is this right for my '98 GS?

 

No those are not the proper plugs for your car.....you need the double plats!

 

Thanks for that. I've rechecked and they are for my IS250-C.

 

Somewhere in the owner's manual it says what spark plugs to use. In the post refresh models Toyota changed the spark plug recommended in the manual from dual ground platinum to iridium. For 98 I know that it recommends double ground platinum which are Denso PK16TR11. Not sure if the ones you're asking about are right. I think the correct plugs are Denso iridium SK16RP11 but maybe someone else can confirm that.

 

Can confirm the correct plugs are Denso SK16RP11. Spark plugs in my GS300 was last serviced at a Lexus dealership before I replaced them and those were the ones I took out. Replaced with NGK BKR6EIX-11, but I don't noticed any difference between the two.

 

these are recommended for jun. '00 gs300

 

NGK BKR6EIX-11\s are the correct plug for the 01+ gs300's as well?

 

I've gone through 2 sets of Denso Spark #3473 Plugs. People say that they come pre gapped. Mine have always come with .038" Gap. Both sets from different vendors. If you're not buying OEM plugs check your gaps. Many tutorials on YouTube how to Gap a spark plug.

 

Think the OP bought plugs for his IS250-c and forgot about it.