k270kmh

Today I had the Ralliart Spark Plugs installed. My impressions:

1. Rev faster
2. Smooth idle
3. Better torque
4. Better and smoother top end

I was running with the stock plugs with 10.000 miles of use.

The Ralliart Spark Plug part number is RAY6601 heat range 7, same as stock.

I recommend this mod!

eve-slow

iTrader: (68)

How much $ and did you get them from Mitsu?

thestaton

iTrader: (2)

Bump... looking to do this as well. Link to where you purchashed them? Doesnt Ralliart also offer spark plug wires?

Thanks
Staton

Event-Horizon

iTrader: (1)

I have the Ralliart Spark Plug Wires and the spark plugs that Ralliart uses. They are Denso Iridium Racing Part No. IW01-24, one heat range colder. The plugs have the fine .4mm iridium tip and a .8mm platinum ground. The idle and accel are very smooth, and I run 24lb of boost every day without any problems with these plugs. I bought the wires from Gruppe-s and the plugs from sparkplugs.com. I don't know if the plugs had anything to do with it, but I put down 307whp 93oct/324whp 110oct and a friend of mine with similar mods but with an intercooler and piping only put down 303whp 93oct /318whp ~110oct. Go figure.

here is some info if interested:
http://babelfish.altavista.com/babel...g%2findex.html

k270kmh

I also installed Ralliart spark plug wires = Very good upgrade. Recommend this mod too.6hp

I bought these parts from japanparts.com

Ralliart parts are expensive, but worthwhile. I never had a problem with Ralliart parts, just positive results.

Ralliart spark plugs and spark plugs wires are made by NGK!!!
RAY66001 = heat range 7 same as stock
RAY66002 = heat range 8 one step colder
RAR**** = racing plug heat range 9. Find more information at: www.ralliart.co.jp

I had an information from Ralliart that these spark plugs were developed specially for the Evo and nobody can sell them. I was a little worried about the results of the spark plugs because I read here in the forum many topics with bad results changing the spark plugs, but for me worked pretty well.

I can't say anything about Denso spark plugs, maybe you will have similar results.

k270kmh

Just to inform you:

stock = 4,5Km/l
+K&N drop-in=5,9Km/l
+RA spark plug=6,9Km/l

ap-evo83

iTrader: (3)

newb quest-i have the stock plugs. car has 22k miles. new turbo. now i have the SES warning light. you think its the plugs that cause the warning light?

ap-evo83

iTrader: (3)

just thinkin if i get the ralliart plugs maybe that will solve the problem.

k270kmh

I do not think that a spark plug can cause/solve a SES light, but your car will like fresh plugs.