stage 2 seat leon cupra r spark plugs

[s1mon]

which of these spark plugs would be best suited to my car
http://www.ebay.co.uk/itm/NGK-IRIDI...arts_Vehicles_CarParts_SM&hash=item3efabbd405

http://www.ebay.co.uk/itm/NGK-IRIDI...arts_Vehicles_CarParts_SM&hash=item3f0a0674d8

 

[EL]

Heat range 7 are the one many use on here. I've purchased a set and will be putting them on

 

[virdi]

The OEM NGK's are fine

 

[sambryant]

Both of the ones above should be fine. I run heat rated 7 as recommended by badger 5 but also said oem is good enough.

 

[s1mon]

on the ngk website is states 8 run cooler than 7,but some places have it the other way.so which is it higher or lower number runs cooler??