I've decided to install the plugs myself. Given that the vehicle has nothing in the way of a tune, it would seem that the 'standard' heat range plug would be the best fit. APR does not seem to offer a 'standard' heat range plug so they are off the table. The prices for the NGK plugs from the dealer seem reasonable even there challenge is 'which one?' They list a 06K905601B Type 1 and a 06K905601L Type 2. Google searches offer nothing in the way of information about the difference. Is it the heat range? the external construction? the internal construction? the ???. There is a price difference in that the Type 2 is over twice the price of the Type 1 so I am assuming there is some difference, but no specifications to suggest what. To ensure theMuffinMan understands what I am saying ... I am not sensitive to the price difference BUT it is the only factual piece of information I've been able to find, other that part number, to distinguish one from the other. I am stating the difference as a fact and not as part of the selection criteria. Looking at the NGK offerings, they seem to be NGK PLFER7A8EG Laser Platinum or NGK LFER7BHX Ruthenium HX. Any insight would be appreciated.
For the last twenty or so years I have only used Bosch plugs. I have had great service in my VWs, Toyotas and Ford.
NGK (who makes the VW ones) offers upgraded Ruthenium HX ones for less money (NGK-supplied VW ones), with improved performance and longevity compared to their aftermarket Iridium-IX ones.
Currently using the NGK racing R7438-8 (NGK 4905)
Ruthenium HX 95125. Lots of good feedback on the forums, I’m using them out of the box gap and they’ve been great. About 5K miles so far
From literally every single objective comparison, the NGK ILKR9Q7G looks like be identical to the HKS M45XL except for price. NGK literally produces the plugs for HKS and NGK is likely the largest plug manufacture in the world with decades of reliable products to boot.
if not oem ACDelco get ones from the likes of ngk, or bosch.
New NGK plugs were a definite improvement. MSD coils were not!
I have solved so many drivability problems taking Bosch plugs out of misfiring engines.
Replaced the plugs -- BKR8EIX per the hstuning blog. I'm still getting the misfires...
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