I know it has been beat to death saying Bosch is crap or AC Delco is crap. We all have good and bad experiences. But is there any technical difference between the 2? Faster warm up, different material ect. My take at this point is it is subjective, what works for me may not work for you.

 

I have used both in my '93 and didnt notice a difference....JMO.. But they are not heated...

 

should have added these are for ODBI converted 96

 

there are more slits in the ACs then the Boschs. Maybe the ACs can have more accurate readings because of this.