They are the same. Havok just bought a new set of Denso plugs for his 5S from the DEALERSHIP with Toyota plastered all over the box. In my opinion, and I could be wrong here, anything that is genuine toyota parts is the best way to go. I had stock plugs in my 7A and they were NGK. I replaced them with NGK Iridiums and wires and I am running an extra 4-6 miles per gallon increase in fuel efficiency. Next step is sea-foam....

Ok ok guys.. I jump on the band wagon of bosh plugs being a tottal waste of time and money... I'm a bit of a parts geek, as well as a member of management for a parts store, and am here to deliver not only my experience, but also the feedback of MANY customers.... in most cars the +4's run "ok"... any body telling u they gained anything more than a smoother idle from them is either high, or had crappy plugs to begin... the spark only jumps to 1... yes 1 electrode at a time as electricity takes the path of least resistance... the whole crappy idle thing might possibly be due to a weak coil as these plugs have impedance (a.k.a. resistance) up and out the ass... the main reasons why us part stores push these plugs are
1) high profit margin
2) they cost more so our sales numbers go up
3) people love how long they last and think we are looking out for wats best for them
4)many times there is some sort of commision for the selling the +4's

As far as NGK or Denso... most of their products are identicle by design... don't be too picky between the two... and as far as iridium goes... it lasts longer than platinum... but 4 u performance guys ur wasting ur money cuz these plugs have way more resistance than platinum n ur better off with standard, or regular platinum plugs...

in short, the more money the plug, the longer the life expectancy on a factory tune

had a mix up at toyota (so I only got 1 plug instead of 4)

so when I get them i'll install my Denso iridiums and my TRD leads.

I put bosch +4's in my 7a and had positive results. The old plugs (I think NGK) had a small bit of fouling but not much. The new plugs made it idle and rev smoother (including high rpm) without any heat issues. My THEORY is that the spark in the +4's only grounds to one tip which would keep it from fouling longer than a regular plug but since I do not have any proof and haven't tested it i'm not going to make a claim that might be false . I can only speak for my st which doesn't have a high performance engine but I'm sure Bosch plugs aren't the absolute worst you can buy. Do the first 6gc diesel swap and you won't have to worry about it.

i was wondering why they worked good for like the first week.... -__-

I've got some new Bosch +4's in my ST202 3SGE at the moment, but if i buy some brand new regular platinum plugs or standard one's, will I notice a difference, and where and what would the difference be???

This post has been edited by Celica-Boy: Jan 12, 2008 - 2:19 PM

anyone know the gap?

>
0.044 on a 5sfe. you probably have a 3sge though, I don't know the gap on that one off the top of my head though, sorry.

tsk tsk, not off the top of your head?

i just picked up some bosch plugs... so they aren't good for my 7afe?

Gaps for usdm:

5sfe (gt) - 1.1mm
7afe (st) - 0.8mm

Toyota owners manual.

bosch isint bad. Its just not for jap cars. German plugs go on German cars.