I found on here that the best plugs to buy for my 2003 Acura CL Type-S Auto Trans is the NGK Iridium IX, but I cannot figure out which ones to buy because they have different Reach. Look at this page to see what i mean https://www.summitracing.com/search/product-line/ngk-iridium-ix-spark-plugs/spark-plug-thread-size/14mm/insulator-type/projected/engine-type/v6 when i narrow the search down to my vehicle it only shows the ZFR5FIX-11/2477 it has .750 reach. Can anyone confirm that this is correct and isn't too much reach? I don't want to punch holes in my pistons. Anyone know what the stock reach is? maybe i need to look in owners manual, find the oem plug type and research it and see.

 

answered my own question.. I found the manual online, type s oem plug is PZFR6E-11 which is: NGK Laser Platinum PZFR6E-11 (NGK 7790) and it has .750 reach.

 

so for the record, i just bought the NGK Spark Plugs ZFR5FIX-11/2477, cost me $37 including being shipped to my door.

 

Should note that they come pre-gapped. Don't attempt to gap them or even measure the gap as it can cause damage to iridium plugs.