08/04/2026
If you're driving an '88 to '95 Chevy or GMC truck, you already know the pain of the factory GM R4 compressor. That round "pancake" unit is famous for weeping refrigerant, leaking around the case seals, and failing way sooner than it should.
For years, we've made the bracket to bolt a modern, efficient Sanden Mini (SD7B10) right where that clunky R4 sat. But the #1 question we always got was: "Okay, I’ve got the compressor mounted... now how the heck do I hook up the hoses?"
We finally put an end to the hose-hunting nightmare by bundling the CNC bracket, genuine Sanden Mini compressor, new accumulator/drier, trinary switch, AND year-specific pre-crimped AC hoses into one complete conversion package!
Check out the full conversion guide here:
👉 https://www.kwikperf.com/blogs/news/the-ultimate-obs-r4-to-sanden-conversion
Here’s what we cover in the blog:
Why the Sanden Mini Rules: It’s lighter, pulls less drag on your engine, and easily keeps an OBS cab ice-cold.
No Custom Crimping Needed: We pair the Sanden compressor's threaded O-ring fittings to your factory condenser and evaporator without a trip to a custom shop.
Decoding the Year Ranges: Breakdowns on K10762 ('88–'90), K10763 ('90–'93), and K10764 ('94–'95) so you get the exact SAE or metric fittings your truck needs.
Stop fighting leaky almost-40-year-old compressor tech! Give the post a read, find your year's kit, and let's get that truck blowing freeze-your-knuckles cold again.
Easily convert your OBS from a leaky R4 compressor to a Sanden Mini with our complete conversion package. No more hunting down a shop to crimp custom lines.