kwikperf.com Blog

There are lots of variations of the so-called “508″ style Sanden AC compressor. Most all have 8 mounting tabs that are compatible with our Kwik bracket kits.

At the top of the list would the following models:

4665 and 4645

These are later versions which are made for R134 refrigerant. They both have 7-groove pulleys and they work fine even though your GM belt is only a 6-groove.

Here’s what different about the two models:

The 4645 has the following features not found on the 4665:

1. High pressure relief valve on the back plate.
2. Rubber dampers on the clutch armature plate. Slightly quieter operation.
3. 300 cc oil capacity instead of the 240 cc in the 4665.

Most people will find these are minor differences and we recommend which ever one you can find the best deal on.

If your parts counter person doesn’t recognize the four-digit model numbers, have them search for the following applications:

4645:
Same as:
Freightliner truck ABP N83 304953
Peterbilt or Kenworth truck 4645SAN
Volvo truck 85100864
CarQuest 274073

4665:
Same as:
Volvo truck 85100887
CarQuest 275088

By the way, we’d like to ask you a favor.  We’re updating our email list and we want to be sure we have the correct email address and we also want to make sure you’d like to hear from us once in a while.

If you want to know about new products, hear about the shows we’re attending, or learn about tips and tricks we learn everyday about engine swaps, here’s what to do.

Go to the form below and enter your name and email address.

Next, you’ll get an email from us where you can click one more time just to be sure it’s really you.  Then you’ll be on our automatic update list.  We promise we won’t pester you too much and we will never share your email address with anyone else.