so i went to the part's store the other day and i allways check if they have any spark plug's for my 85 rx7 gsl-se and i guess the old plug's have been replaced with a new plug part #5777,has and one used these plug's and if so do you like them the look crazy,mabie ill take a pic of these and post them,haha i made the part's store show me there comp and is showed the old part # and said to be replaced by part # 5777

 

http://i610.photobucket.com/albums/t...7/DSCF4600.jpg
http://i610.photobucket.com/albums/t...7/DSCF4601.jpg
http://i610.photobucket.com/albums/t...7/DSCF4602.jpg

 

the weird thing is when i went there on the comp screen it said 1985 mazda rx7 13b is what they pulled up,and it showed the old plug number and it said to be replaced by these plug's......and i dont want to use them if they are not the right plug's for my car,i have not upgraded the ignition

 

Take them back and get the Br8EQ-14

 

i have been useing the BR9EQ-14 should i be useing 8's ?....

 

you definatly should be using the BR8EQ-14's!

 

9s will foul easier. Either get the stock 8 range for your car or upgrade to 2gdfis and MSD trailing to use those BUR7 and BUR9s.

 

whats the difrence betwine the 8's and 9's,and just so u know i have a 1985 gsl-se

 

how are B7 and B8ES's? someone told me that i can use those... ive been running BR8EQ-14s for years now and ive never had a problem w them

 

heat range. with NGK a higher number is a colder plug