It was an offer I couldn't refuse -- the L-tuned group buy. Although there are definitely no intakes in my future, in a moment of weakness, I could see myself putting in some clear side markers.

Thanks for the advice on the plugs.

 

denso is lexus oem plugs and thats what i like

 

i'm gonna try denso iridiums. i've always used ngk in my honda and it worked great. but,

1. denso has the world's finest core.
"...the narrower the centre electrode is, the lower the potential difference (voltage) that is required to jump the gap between centre and ground electrodes."

2. denso uses the u groove.
"...ground electrode which is claimed to aid in the production of a 'flame core' which further improves the combustion process."

3. denso is owned by toyota.

 

yup trd plugs are definitely denso. i just saw some today. i think the denso logo on the plug is larger than the trd logo.

 

here are the part numbers for those who need them.

GS400/430 - LS400/430 - LX470 - RX300 - ES300 - SC400/430 - GX470
Denso Iridium - IK20
NGK IX iridium - BKR6EIX-11
NGK OE Laser Iridium - IFR6T-11

GS300/IS300/SC300
Denso Iridium - IK16
NGK IX iridium - BKR5EIX-11
NGK OE Laser Platinum - BKR5EKPB-11

 

I picked up the NGK IX's for my GS400 because they were the cheapest iridiums and were available at my local autoparts store. $46 for all of them.

 

NGK's are cheaper than the Denso Iridium plugs. But I think the Denso's are better since TRD highly recommended them. I was using the IK20 plugs for my supercharged Corolla before.

 

they are pretty much the same damn thing...

 

I think this thread should only be responded to by those that have actually run both plugs in comparable situations-same car,etc...To give factual comparison results.

Just because someone used Denso or NGK and they liked it is irrelevant. We are talking comparison here, not if you liked a plug. Shove a banana in the spark plug hole and run a copper wire through the middle and some would say it's a good spark plug, but again ,nothing to compare it to. For those that have run both plugs and commented on them-that is the feedback that should be considered worthwhile.

 

even on 26 psi, race gas, and around 500 wheel horsepower, my talon could have cared less if it had ngk or densos - there was zero performance difference, and if you didn't read the lettering on the side, you couldn't tell the difference between the two....

 

Completely agree. Maybe we could argue whether plantains would be better in this application than bananas. More potassium maybe, better for spark?
BTW, that banana thing, is that anything like the Beverly Hills Cop thing where he shoves a banana up his tailpipe?

 

well me myself dealin with supras for all my life i prefer densos. only ever had one problem with them and that was my fault. the ngk's i ran the ivory broke all the time and it would ping around in the cylinder.

 

You probably would have been better off with standard $0.79 copper plugs and just swapping them every few months. A friend of mine does this on his Jetta turbo (but only running about 280hp at the crank) to good effect. Turbo motors just get so damn hot that plugs don't last long anyway, so may as well go cheap if you have to replace them that often.

 

I shoulda clarified... copper ngk's or denso's



And I replaced them every time we went to the track...

 

I agreed, I replaced all Beru spark plugs on my BMW with NGK copper, and the idle is significantly quiet as many Japanese cars.