NGK IRIDIUM IX SPARK PLUGS FOR SUBARU IMPREZA
07 January 2011, 04:59 PM
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NGK IRIDIUM IX SPARK PLUGS FOR SUBARU IMPREZA
NGK Iridium IX spark plugs available for:
2.0 Impreza Turbo Versions 1-6 (All models) - Clicky
2.0 Impreza Turbo STi & WRX Versions 7-8 (All models) - Clicky
2.5 STi Impreza Turbo Version 9-10 (Hawkeye/Hatch) - Clicky
2.0 Impreza Turbo Versions 1-6 (All models) - Clicky
2.0 Impreza Turbo STi & WRX Versions 7-8 (All models) - Clicky
2.5 STi Impreza Turbo Version 9-10 (Hawkeye/Hatch) - Clicky
Last edited by JP4mance Tuning Parts; 07 November 2011 at 10:39 AM.
10 January 2011, 10:54 AM
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As a very general rule of thumb, go 1 stage cooler than stock for every 50-100bhp increase. It requires some research though, no 2 engines are the same and many factors will determine performance and wear of the plug.
The plugs are pre-gapped. Iridium IX plugs shouldn't really be re-gapped.
Hmm... can anyone tell me the stock part number of the 2008+ Hatch spark plugs? I'll see if they cross over to an IX plug from that...
The plugs are pre-gapped. Iridium IX plugs shouldn't really be re-gapped.
Hmm... can anyone tell me the stock part number of the 2008+ Hatch spark plugs? I'll see if they cross over to an IX plug from that...
10 January 2011, 12:44 PM
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Thanks, Paul!
This part number does cross over to the Iridium IX plugs which we stock in heat grade 7 (1 grade cooler). specs: 14mm, 26.5mm reach, 5/8 hex
I'll update the thread above & website now.
This part number does cross over to the Iridium IX plugs which we stock in heat grade 7 (1 grade cooler). specs: 14mm, 26.5mm reach, 5/8 hex
I'll update the thread above & website now.
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17 January 2011, 04:41 PM
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Now stocking NGK OEM replacement spark plugs and Iridium IX upgrades for the 2008+ Impreza's WRX & STi (GRB)
NGK Laser iridium (heat 6) - OEM
NGK Iridium IX (heat 7) - Upgrade
NGK Laser iridium (heat 6) - OEM
NGK Iridium IX (heat 7) - Upgrade
22 February 2011, 11:21 AM
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NGK Laser OEM spark plugs for the Impreza 2006-07 (Hawkeye) are now listed and available:
http://www.jp4mance.co.uk/products/1/Subaru/_/2741/
As are the Iiridium IX upgrades in heat grate 7:
http://www.jp4mance.co.uk/products/1/?related=585
http://www.jp4mance.co.uk/products/1/Subaru/_/2741/
As are the Iiridium IX upgrades in heat grate 7:
http://www.jp4mance.co.uk/products/1/?related=585
17 March 2011, 03:04 PM
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Hi there, any idea what plugs will suit my car - modded classic c450hp? Running racing 8s at the mo which I'm not too happy with (expensive & don't seem to run that good 
)
TX.
)TX.
17 March 2011, 03:09 PM
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http://www.jp4mance.co.uk/products/1/Subaru/_/2725/
I run 7's in my '53 STi (TSL333 tuned) and i can't fault them. Very smooth idle too.
Last edited by JP4mance Tuning Parts; 17 March 2011 at 03:12 PM.
21 May 2011, 12:21 PM
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Probably a cooler plug, heat range 8 possibly even a 9.
Are you in the process of building the engine or have you been running the car at 550bhp? If so, the current condition of the plugs will give you a clue.
Too hot means not enough heat transfer to the cylinder head
Too cold means the plug won't burn off carbon deposits efficiently
More info: http://www.jp4mance.co.uk/gallery/4/35
Are you in the process of building the engine or have you been running the car at 550bhp? If so, the current condition of the plugs will give you a clue.
Too hot means not enough heat transfer to the cylinder head
Too cold means the plug won't burn off carbon deposits efficiently
More info: http://www.jp4mance.co.uk/gallery/4/35
15 August 2011, 01:26 PM
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Hi, it says out of stock for the NGK PFR7B:
http://www.jp4mance.co.uk/products/1/?related=1155
Are they available? How do I buy?
http://www.jp4mance.co.uk/products/1/?related=1155
Are they available? How do I buy?
15 August 2011, 04:28 PM
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As it says we're currently out of stock on that part number and it'll be early next week before the next shippment arrives. The iridium upgrades are a good alternative though, plenty of those in stock. Cheaper too 
15 August 2011, 06:24 PM
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I too am running NGK7s but am due a service so would the Iridiums be like downgrading for me?? Or are they of equal characteristics???...
classic STi6, rebuilt forged engine, 20g turbo, 550cc injectors, Tek 3 remap etc etc (est 350-370bhp)
cheers
classic STi6, rebuilt forged engine, 20g turbo, 550cc injectors, Tek 3 remap etc etc (est 350-370bhp)
cheers
07 November 2011, 10:31 AM
#29
Hi,
Please could you confirm if the 2006 wrx 2.5L Hawkeye plugs are ILFR7H part number?
This is the part number I have been told to use for the uprated heat 7 plug for my 340bhp wrx.
p.s. The link at the top of this post no longer works.
Ta.
Please could you confirm if the 2006 wrx 2.5L Hawkeye plugs are ILFR7H part number?
This is the part number I have been told to use for the uprated heat 7 plug for my 340bhp wrx.
p.s. The link at the top of this post no longer works.
Ta.