A search at www.championautoparts.com by application shows Champion Part No. 9201 for a 2000 Discovery. The plug type is RC12WYPB4. The "12" in the plug type vs. the "11" for the 7070 indicates it's one heat range step hotter, meaning it doesn't dissipate heat quite as efficiently. Maybe not enough to matter.

There is also an RC11WYPB4 available (Part No. 9003). It's specified for cars and trucks from other manufacturers. It would be the same heat range as the 7070, but it's gapped to .044 vs. the .040 specified for the DII. I don't know how much of a difference 4-thousandths of an inch would make. Maybe not much. Its physical specs are otherwise identical to the 7070.

 

Got the STI as you suggested from FCP Euro and got the 7070 plugs from rock auto for $3.43 a piece!! Thanks

 

SCORE!

Now, be sure you get a new upper intake manifold gasket and remove the upper intake to make changing the wires much easier.

 

So I have to ask

NGK plugs get a positive review in this thread but no mention of NGK wires??
Rockauto has NGK wires, NGK 58404, for $24.79 - and they're 7mm

Any reason this isnt a suitable option?

Also just found this - never heard of these - NGK 95159

Ruthenium HX NGK Spark Plugs is introducing the latest technology in high ignitability spark plugs to the automotive aftermarket: NGK Ruthenium HX. Today's efficient engine designs create more power while using less fuel and this has shortened the life of traditional Iridium and Platinum spark plugs. In response, NGK's patented Ruthenium technology is used for maximum durability and performance in newer engines where efficiency is demanded.

Features & Benefits:

• DFE (double fine electrode) and PSPE (projected square platinum electrode) tip designs. DFE maximizes ignitability while reducing emissions for low heat engines, and PSPE provides the best ignitability and service life for high heat (typically turbo and supercharged) engines.
• Superior oxidation resistance and enhanced blistering/anti-peeling to provide the most optimal durability at high temperatures in various driving conditions.
• Advanced high-ignitability technology that provides more complete fuel burn than other precious metal spark plugs, resulting in quicker throttle response, smoother idle, and better cold starts.

 

The NGK wires vs STI = no comparison IMHO.

 

100%

In the last year I've seen more bad NGK wires.
IDK why they can't get the wires right because the Spark Plugs, Oxygen Sensors, etc. are spot on quality.

 

I'm actually amazed to hear the NGK wires are bad. I agree with @OverRover . I've always preferred NGK/NTK branded O2 sensors and spark plugs due to their quality products.

 

HA .... NO.


I dont have SAI. It should be doable with out removing, no?

 

I'm with you - No SAI -

I probably need to hit up Harbor Freight for some longer needle nose like in the video...

 

You can do it without SAI, but IMHO it's still faster to just pull the intake, and get it over with vs cutting your hands to pieces. I've honestly done coils/wires/plugs, and re-used the upper intake gasket. You can tell when it's time it should be replaced 100% flat, or cracked. If it comes off looking just like a new one re-use it and move on.

I tried a set of NGK wires on a D1/D2 and I was not at all impressed with the quality (customer requested them)