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You know unless I was doing some serious performance mods to my engine that altered the combustion needs I don't think I would Change what is recommended and came factory unless its time to replace and you are asking advice on brand preference. I've always been happy with NGK.
 

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^ completely agree. There is no magic plug that will boost hp. If you install the wrong range plug it will actually hurt mileage and performance.
 

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The only plugs I can find for the 1.4L Turbo is the Denso part #5337. I don't wanna pay a ton to get stupid plugs from the dealership.
have you priced them at the dealer? last time I had to purchase plugs at the dealer was in 2006 for the Hemi Durango we had, and they were only about $2 each if I remember right. The mark up on some parts is not that bad.
 

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You know unless I was doing some serious performance mods to my engine that altered the combustion needs I don't think I would Change what is recommended and came factory unless its time to replace and you are asking advice on brand preference. I've always been happy with NGK.
I can tell you I went with one of those multi prong spark plugs on my caliber, and about 5000 miles later all of the control modules went haywire. Ever try to drive stick when the computer is randomly sending gas to the engine - not fun. My dealer said to stick to the original brand or oem - and i have not had an issue since.
 

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I'm not a sparkologist so I have a question. Does the ignition system have enough energy to fire the larger gap? I know larger gap means bigger spark to ingnite fuel but could we be getting a weeker spark or missfire from to big of a gap? I do like the price of $2 instead of $9 for the Denso OE plugs. And I am all for performance that you can feel especially for 10 bucks!
 

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the .060 is not that long of a gap for the coppers. the stock platinums and iridiums are garbage plugs with horrible resistance to spark only for plug longitivity to appeal to the toyota whiner baby crowd to appease the "i dont do maintianence for 100K miles. for the 45+ dollars you spend on the so called stock plugs to be changed at 100K intervals vs the 10 dollar or less Autolite Coppers you save money even with changing them at 30K. for the better responce, better power and all around better drivability for the copper(BTW they are for the 2.0 and 2.4 ONLY) the difference is a MAGIC Plug) lol.

PS. if you go and check the head of the iridiums/platinums VS the coppers the filiment is gigantic. the copper has a better firing surface and trust me. the ignition for these cars is plenty strong enough. they have a set of recomended copper for the 2.0/2.4 but the part number is not correct and does not fit in the head. hence why we suggest the AutoLite 5325.
 

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Great to know. Thanks for all the info. Think I will be stopping by Napa on my way home today.
 

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Hahaha PNW is raining. They are sitting on the seat beside me. Gonna try and get them in tonight. I want to get a feel for what difference they make before my CAI arrives friday. I know the light weight pulley makes a difference on free revs but do you really get much difference when the engine is under load? I'm not going to the track so looking for a little more bang for my buck.
 

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Hahaha PNW is raining. They are sitting on the seat beside me. Gonna try and get them in tonight. I want to get a feel for what difference they make before my CAI arrives friday. I know the light weight pulley makes a difference on free revs but do you really get much difference when the engine is under load? I'm not going to the track so looking for a little more bang for my buck.
The Spark-plugs are night and day difference. You will get a lot out them, more than I thought. Over-all drive-ability has improved immensely. You going straight CAI with your Intake? I wouldn't mess around with SRI if you have the chance to get straight CAI... every little bit helps!
 

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I would be interested to see what the difference (if any) is quantified on rollers (dyno).
E/Ts can be effected by driver and weather.
 

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The Spark-plugs are night and day difference. You will get a lot out them, more than I thought. Over-all drive-ability has improved immensely. You going straight CAI with your Intake? I wouldn't mess around with SRI if you have the chance to get straight CAI... every little bit helps!
What is SRI? I ordered the Injen SP5041P. I wanted the black but I will probably be rapping it anyway. This is the full cold air system with filter and MR Technology. I allready had the front clip off once when I was looking to remove my grill. That was before I figured out the grill is what holds the whole front clip together:(. I wonder if there is a way to get the lower part of the CAI installed through inner fender or removing the aero plate?
 

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What is SRI? I ordered the Injen SP5041P. I wanted the black but I will probably be rapping it anyway. This is the full cold air system with filter and MR Technology. I allready had the front clip off once when I was looking to remove my grill. That was before I figured out the grill is what holds the whole front clip together:(. I wonder if there is a way to get the lower part of the CAI installed through inner fender or removing the aero plate?
if your worried about installing it and dont want to pull the whole front end off the car. if you take the front passengerside wheel off. you can remove the black inner fender plastic and installt he CAI fully.
 

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if your worried about installing it and dont want to pull the whole front end off the car. if you take the front passengerside wheel off. you can remove the black inner fender plastic and installt he CAI fully.
Hahaha:), Not worried, was just hoping there was an easier way to install the full system without having to remove the front clip again. I consider myself to be pretty mechanical but when it comes to all those stupid pain in the ass hidden secret release snaps:mad:.

Thanks for the scoop on getting in through the passenger wheel well.

Heading to the garage to swap the spark plugs.:D
 

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I would be interested to see what the difference (if any) is quantified on rollers (dyno).
E/Ts can be effected by driver and weather.
on the focus forum im part of there have been DYNO proven results of 4 to 5 WHP gains from changing over from Plats to Coppers. there are three basic needs of any internal combustion engine. AIR, FUEL, SPARK. you fix them or alter them you gain. the plats are a very resistant materiel only used for longevity. the coppers will last roughly 25K-30K miles but the benefit outweighs the inconvenience of changing them periodically. for the 10 bucks i spent its to me the most noticeably felt change.
 

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Ok, first impression. It didn't cause me to spill my morning coffee on the way to work this morning but you can definantly feel a difference. There is a very noticeable smoother and stronger pull as you accelerate. Seems to help low end where before if you are driving light footed the trans shifts to early in IMO and boggs down sometimes forcing you to add gas and then trans down shifts to get you going. Good improvement there.

My only concern or question would be trying to set the gap to .060. This is a stretch for this plug and required a bit of work to reshape the electrode for the larger gap while trying to maintain the relationship of the ground electrode to center electrode. Maybe there is a comparable plug with a longer electrode designed for larger gaps?
 
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