Dec 16, 2014, 12:29 PM
Last edit by: IB Advertising
See related guides and technical advice from our community experts:
Browse all: Lexus IS Engine and Powertrain Guides
- Lexus IS GS: How to Replace Spark Plugs
Step by step instructions for do-it-yourself repairs
Browse all: Lexus IS Engine and Powertrain Guides
Spark Plug Change for GS300
TIP
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.
Driver School Candidate
Joined: Aug 2002
Posts: 4
Likes: 0
From: california
iridium for 300?
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.
Thanks.
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.
. Also did clean out the OE air filter the quick way by taping the dirty side of the filter. Lotta dirt fell out.
ClubLexus Stories
Celebrating Lexus & Toyota from Around the Globe
8 Tips for Improving Your Hybrid or Plug-in Hybrid's Efficiency!
Michael S. Palmer
10 Best Lexus Models No One Remembers
Joe Kucinski
TRD Off-Road Premium: Best 2026 4Runner, Except This One Thing
Michael S. Palmer
Top 10 Lexus & Toyotas to Drive Before You Die!
Joe Kucinski
Top 10 Lexus/Toyotas With The LEAST 5-Year Depreciation
Joe Kucinski
Lexus LC500 Convertible Auction: A Preview of Rising Values?
Brett Foote
GX 550 vs TX 550: Best 3-Row Luxury Lexus Family Hauler
Michael S. Palmer
9 Best Lexus Models You Can Buy for Half Price (And 1 You Shouldn't!)
Joe Kucinski
2026 Lexus NX Buyer's Guide: Models, Features, Prices & More!
Brett Foote
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
Moderator - Electronics Forum
Joined: Feb 2001
Posts: 3,985
Likes: 12
From: Illinois
New Torquemaster site...
http://www.extremespark.com
Mine have been going STRONG for 90k miles. Try that with Denso!
Percy
111k on GS400.
http://www.extremespark.com
Mine have been going STRONG for 90k miles. Try that with Denso!
Percy
111k on GS400.
Racer
Joined: Jan 2004
Posts: 1,482
Likes: 31
From: California
Originally Posted by redjeeper
I've got about 73,000 on my GS but it came with NGK plugs instead on the Denso's.
Moderator - Electronics Forum
Joined: Feb 2001
Posts: 3,985
Likes: 12
From: Illinois
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
Glad most of the G35 guys don't know about the plug...it would be a deadly weapon against the GS.
Percy
Originally Posted by Lexizm
Great post 
I can really use this once I decide which plugs to go with. Anybody try out the Torquemasters in a GS300?
I can really use this once I decide which plugs to go with. Anybody try out the Torquemasters in a GS300?