I like the R8 coils because they're cheap. At $20 per Bosch coil, you can throw an extra in the trunk without breaking bank. I did mine when my factory bolt downs went bad.
I did Oem plugs and Bosch coils. No problems so far.
I use the Bosch, and Ive been happy with them so far.
Bosch.
Never had issues with the Red Bosch ones I got from Shopdap.com But plugs, I preferred the NGK Ruthenium HX over the Laser Platinum, and Iridium-IX
I have used the 027 coil in a beetle with with points and the coil was getting hot. It was solved by using the 039 coil (Bosch grey).
Had thrown some 2 years ago and still running clean as ever
The Delphi coils are junk. Bosch updated the coils they offered and we've used the updated coil multiple times and never had to warranty a single one out in the 4 years we've been installing them.
Everytime we've used a Delphi in the past the white silicone on the boot degrades and falls apart in 6-12 months and customer cars came back with misfires again.
The old Bosch coils wear out because people don't do spark plugs and replacements on time. The old plugs end up with crazy gaps and it kills the coils. Usually at 100k-120k miles but honestly that's the normal lifespan of a pencil style coil regardless.
If you're plugs are old and you're beginning to experience misfires then save yourself the time do all 6 plugs and coils. Your N52 will thank you.
The R8 coils are cheaper then the standard Bosch coils so cheaper if nothing else.
I've replaced 4 of the 6 packs over the last three or so years. All but one actually broke in two when trying to remove them, leaving the bottom half on the spark plug!! I suspect water ingress (not sure how with all that plastic) as the coil packs all showed signs of corrosion.
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