redjeeper

varcity, I just cleaned the engine this weekend when I waxed the car. I'll see if I can post a pic of me eating off of it.

pjvarino

Here is the Lexus Repair manual pages for the Ignition System/Spark Plug overview...
Hope this helps.

NYBlkLex

Nice job Red....Can you post a DIY on changing the transmission fluid.

mcgong

ntran18

iTrader: (27)

Just did it this past weekend. Use compress air to blow out dirt or anything else around the plugs BEFORE removing it. You don't want anything falling into the combustion chambers when you put the new plugs back in, especially those of us driving in dusty places.

tonylani

You said you replaced the stock with denso iridium plugs. Are those iridium plugs twin ground electrode plugs? If so what is the part number? The manual specifically says to use only twin ground electrode plugs and I didn't know that denso has iridium plugs with twin electrodes.

Thanks.

ntran18

iTrader: (27)

I used the Denso Iridium IK16(.4mm tip). The OEM plug I took out is Denso SK16R-P11 (also section 6-2 of the owners manual). Got mine for $8.5/each PM me for info, don't have it on me now. So far, it's working well. Feels like there is a little more power, but could just all be in my head . Also did clean out the OE air filter the quick way by taping the dirty side of the filter. Lotta dirt fell out.

tonylani

ntran18
what year is your gs300? I have a 1999 gs300 and the stock plug is either Denso SK20R11 or NGK IFR6A11

Is IK16 twin electrode?

ntran18

iTrader: (27)

Mine is 01 GS3. I don't know about twin electrodes, but those parts are for a GS4. Go down another 2 pages in your manual for the plugs for the GS3. Here is the Denso decoder: http://www.densoiridium.com/identifyplugs.htm

Mean Green

Did it make a difference in the performance.

Percy

New Torquemaster site...

http://www.extremespark.com

Mine have been going STRONG for 90k miles. Try that with Denso!

Percy
111k on GS400.

Lexizm

iTrader: (2)

Great post I can really use this once I decide which plugs to go with. Anybody try out the Torquemasters in a GS300?

GSing430

straight from the toyota/lexus, it will come with ngk, but when you order it through the dealer as oem replacement, they will come with the denso....

Percy

Is yours a GS4 or GS3? Mine came with the Denso Iridiums out of the box. (GS4)

Percy

Percy

It should work out nicely. I just replaced the plugs (iridium crap) out of my brothers G35x with the Torquemasters. Geez that thing revs!!! He notices quite a bit of difference and picked up a couple of mpg as an added bonus.

Glad most of the G35 guys don't know about the plug...it would be a deadly weapon against the GS.

Percy