Hose kit includes:

#10 suction hose (1/2” ID, 1” OD)

• 90 degree swivel from receiver/drier
• 135 degree swivel with service port to compressor

#8 high pressure hose (13/32” ID, 29/32”OD)

-135 degree swivel with service port from compressor

-Straight swivel connects to safety switch fitting

-Safety switch fitting

-Safety switch (can be wired as binary or trinary)

-40 amp fan relay

-90 degree hardline connects safety switch fitting to condenser

-Vertical AC manifold, Kwik part number 045024

Other requirements:

GM R4 compressor with 6-groove serpentine pulley

94-95 OBS R4 AC Instructions

Kwik Performance OBS AC Hose kit installation Video

Kwik Performance AC System Trinary Switch Wiring Instructions (YouTube)

Trinary Switch wiring diagram (pdf)

Q: Which compressors are compatible with this kit? This AC Hose kit works with GM R4, if you have a Sanden Mini check out our K10669 or if you have the Sanden HD check out our K10670.

Each kit is tailored to the fitting type and mounting style of the compressor you're using. Be sure to select the correct option when ordering.

Q: What years of OBS Chevy, does this A/C hose kit fit? This kit is designed for 1994–1995 OBS Chevy trucks.  These trucks came with R134 refrigerant and use metric hose fittings.

Q: Which A/C compressors are compatible with this kit? This kit is built for use with factory style GM R4 compressor.

Q: If I’m keeping my factory R4 compressor, why  do I need a Kwik hose kit? The Kwik R4 bracket for an LS style engine places the compressor in a different orientation and the factory hoses and manifold are not clocked properly.

Q: Is this kit ready to install?  Absolutely. You'll get all the hardware: pre-bent hardlines, pre-crimped hoses, service ports, O-rings, a trinary switch, and a compressor manifold, along with  instructions and wiring diagrams for hassle-free installation. You or the AC shop doing the install will need to replace your dryer.

Q: Do I need special fittings or extra crimping for this kit? No. All hoses and fittings are pre-crimped and clocked correctly, so you don’t need to source additional parts or make trips to a shop for custom crimping.

Q: Do I need to replace the drier? It’s always a good idea to replace the drier anytime the system is opened so a new drier is included in the hose kit.  Do not open the drier until you're ready to pull a vacuum, as it contains moisture-absorbing desiccant that can become saturated from ambient air. 

Q: Why do you include a trinary switch instead of just a binary one? The trinary switch offers an upgrade: it not only protects your system from high/low pressure, but it also triggers electric fan control — crucial for LS swaps or any setup running electric fans instead of a mechanical clutch fan. However, it can be wired as a binary switch if no fan control is needed. A wiring diagram is provided showing both methods. 

Q: Which Kwik Performance brackets does this kit work with? This kit works with Kwik Performance bracket kit K10623

Q: Do you provide installation support? Absolutely. We include detailed, photo-based instructions and wiring diagrams for every kit. You can also access support via our online Tech Portal or contact us directly if you need help.