Bosch Spark Plugs
Looking to replace the plugs and I get Bosch FR8DPP33+, 9600, and 9652. Which is best for a 6spd NA coupe in a hot climate please ? Is there a difference ? YWTK
ps 9600 seems to be a heat range 8, 9603 (mentioned in another post) is a 7 (colder). Is the 03 for a SRT ? These two are indium, DPP is dual platinum.
pps is one plug easy to get to to see what is in there ?
Last edited by Padgett; Aug 8, 2014 at 04:39 PM.