Spark Plugs

[thewelsho]

The picture below shows the spark plug from my car: MY06 WRX 2.5. the brand new one was bought to slot in to a MY05 STi 2.0. As you can see, there is a considerable difference in size of them, so take note if you are going to change your own plugs, that plugs from older models will not do.

Edited September 24, 2007 by TheWelsho

[thewelsho]

I meant to ask, where in Glasgow can I pick up a new set of plugs? performance ones.

Edited September 24, 2007 by TheWelsho

[fai17]

Your usual motor factors will all should stock them...like Dingbro,Andrew Watts,etc etc.

[fai17]

I can't believ there sucha difference in lenght.

Does anyone know why?

[thewelsho]

Your usual motor factors will all should stock them...like Dingbro,Andrew Watts,etc etc.

Cheeeeeeers!

[fai17]

SUBARU 2.0 IMPREZA (10/00-->) SPARK PLUGS

Showing Recommended Products. Click on "Extra Info" to view full details for that product.

Model Detail Engine Type / Additional Info Year Part No Stock No Extra Info

IMPREZA (10/00-->) 2.0 EJ20 / 19mm Reach Plugs 10/00 –> PFR6B 3500 Extra Info

IMPREZA (10/00-->) 2.0 EJ20 / WRX STI 19mm Reach Plugs 01/02 –> PFR6B 3500 Extra Info

IMPREZA (10/00-->) 2.0 EJ20 / 26.5mm Reach Plugs 09/05 –> ILFR6B 6481 Extra Info

SUBARU 2.5 IMPREZA (10/00-->) SPARK PLUGS

Showing Recommended Products. Click on "Extra Info" to view full details for that product.

Model Detail Engine Type / Additional Info Year Part No Stock No Extra Info

IMPREZA (10/00-->) 2.5 EJ25 / 26.5mm Reach Plugs 01/06 –> ILFR6B 6481 Extra Info

[fai17]

so the part number that you should be looking for is ILFR7B if they do one

[thewelsho]

so the part number that you should be looking for is ILFR7B if they do one

where did you find that Peter? the number on my current plugs is ILFR6B. Itake it the 7s are the performance ones.

[WUZ]

where did you find that Peter? the number on my current plugs is ILFR6B. Itake it the 7s are the performance ones.

Correctamundo!

Russell

[Green Hornet]

where did you find that Peter? the number on my current plugs is ILFR6B. Itake it the 7s are the performance ones.

The 7 is a 'colder' plug - dissipates heat into the head/water jacket faster and helps to reduce combustion chamber temps so fending off the possibility of detonation. Good idea to fit colder plugs when remapping for increased boost and performance.

However, somewhat bizarrely, NGK don't make an ILFR7B plug! (sorry - dont' know why there isn't a straight heat rating number change like there was on the PFR plugs used in 2.0 engines)

Correct part no. for colder plugs on the 2.5 is ILFR7H (same plug used in the Evo IX).

Hope this helps.

Cheers,

Stewart.

[thewelsho]

The 7 is a 'colder' plug - dissipates heat into the head/water jacket faster and helps to reduce combustion chamber temps so fending off the possibility of detonation. Good idea to fit colder plugs when remapping for increased boost and performance.

However, somewhat bizarrely, NGK don't make an ILFR7B plug! (sorry - dont' know why there isn't a straight heat rating number change like there was on the PFR plugs used in 2.0 engines)

Correct part no. for colder plugs on the 2.5 is ILFR7H (same plug used in the Evo IX).

Hope this helps.

Cheers,

Stewart.

YES! Got those, fitted them. Now PLEASE go look at my other thread and see if you can help me Stewart as plugs didn't work!

Edited September 27, 2007 by TheWelsho