Question? Denso iridium IK20 vs. IK22 plugs

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Apr 11, 2005 | 05:46 PM

ROSSCAD

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Joined: Dec 2003

Posts: 30

From: Forest Hill, MD USA

Car Info: 09 wrx(4door)spt

Question? Denso iridium IK20 vs. IK22 plugs

I am looking to get iridium spark plugs for my stock 03 wrx. I am looking for pros and cons for Denso iridium IK20 plugs vs. IK22 plugs. I hear that IK22 which is a colder plug, make your car idle like crap.

Apr 11, 2005 | 09:18 PM

Cyrus923

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From: Knoxville, Tennessee

Car Info: 2004 WRX in WR Blue

WHen you start upping the boost a lot and changing out the turbo you will need to go with a colder plug. I only have light mods...boost to 16.5 psi and a flywheel/clutch and I stuck with the 20's.

Apr 11, 2005 | 09:46 PM

973scooby

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i have the ik22's on a lightly modded 02wrx running 16lbs and it idles fine..i'm saving more gas as a matter of fact.. i just had the plugs in for about a week and so far so good..my friend also put in today a stock temp iridiums (NGK) and it's also idles fine..

Apr 28, 2005 | 04:03 PM

hays00s

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Posts: 15

From: Antioch, CA

Car Info: 2002 WRX Wagon

noob question: Do the Densos fit perfect? More specifically, is there any bending of the ground electrode that must be done? (I'd read somewhere on NASIOC that people were manually changing the gap, and i'm hoping that's not the case).