i have a 05 5at sedan

my spark plugs are weak so i went to the dealer who had a price of all 6 for 100dollers

a friend is selling HKS M40iL heat range 8 spark plugs for 70 dollors so i thought i would go for them


i went on HKS's website and it said that M40iL spark plugs are a general application, but then i went down and for HR engines it said M40il and for DE engines it said M35iL, i tried e-mailing HKS but no luck there. so does any one know if they fit ? or has any one installed them?

heres the product link

 

get some denso iridiums

 

Heat range 8 is way off. The G (N/A applications) uses heat range 5. I only use range 6.

 

i used a 7 on my boosted vw.. cant remember about my 03 cobra