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Kwik Performance Inc.  |  SKU: K10708

AC Hose Kit (88-90) OBS Chevy - Sanden HD - K10708

$295.00 USD
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Description

Bolt-On A/C Hose Kit for 1988-1990 OBS Chevy Trucks (Sanden 508/709 HD Compressor)

Connect to your factory AC system with new hoses designed specifically for 1988-90 OBS Chevy trucks. This kit requires a condenser with (1) male and (1) female connection at the condenser. 1990 was a changeover year, if your truck has two male connectors at the condenser check out our AC Hose Kit (90-93) OBS Chevy - Sanden HD - K10670. 

 

Key Features

  • Dryer/Accumulator and PAG oil - Now included!
  • Pressure Safety Switch - High and Low pressure protection for your AC system
  • Complete bolt-on solution – no custom crimping or sourcing extra fittings
  • Factory-style fit – pre-bent hardlines prevent hose rub and ensure durability
  • Pre-crimped hoses – clocked correctly for simple installation and OEM-style reliability
  • Service ports – suction and discharge hoses feature service fittings for easy charging and diagnostics
  • Flexible wiring – safety switch can be wired as binary (compressor only) or trinary (compressor + fan control)
  • Kwik Performance engineered – designed to integrate with Kwik A/C brackets for LS, BBC, and SBC applications

 

For use with Kwik Performance AC brackets using Sanden HD 508/709 AC compressors:

LS wide mount:

K10470   Corvette spacing

K10471   F-body spacing

K10472   Truck/LS3 Camaro spacing

LT - L83/86 Gen 5 Trucks:

K10702   (14-19) AC-Alt/PS

Big Block Chevy M4 System:

K10255   AC-Alt/PS Type 2 

K10654   AC-Alt/PS P-series

 

Click on image to view our OBS condenser guide

Click below to view our AC wiring instructions

What's Included / Other Requirements

508/709 AC hose kits include:

#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

-Bent ½” hard line with #8 male and female swivels connects to condenser

-Dryer/Accumulator

  • We recommend waiting to install until ready to charge the system.

-PAG oil (8oz)

Other requirements:

Sanden SD7H15 (709) AC compressor, Kwik part
number 10300-01

Or Sanden 508 style compressor for BBC or SBC
engines (not recommended for LS engines)

Installation Instructions

88-90 OBS Sanden AC lines Instructions

Kwik Performance OBS AC Hose kit installation Video

Kwik Performance AC System Trinary Switch Wiring Instructions (YouTube)

Trinary Switch wiring diagram (pdf)

FAQs

Q: What compressor does this AC hose fit?

A: This AC Hose fits the Sanden HD Compressor, We have other kits for the Sanden Mini and the GM R4. 

Q: Can I reuse my GM R4 compressor?
 A: No, this kit supports the Sanden HD Compressor. If you want to re-use your GM R4 compressor see our K10709 or K10671.

Q: Will this kit fit my 1990 OBS truck?
 A: 1990 was a changeover year. If your condenser has one male and one female fitting, this kit is correct. If it has two male fittings, use the 90–93 Sanden HD Kit – K10670.

Q: Does this kit support both binary and trinary switches?
 A: Yes. It includes a trinary switch by default, which can be wired as either a binary or trinary based on your needs. A wiring diagram is provided.

Q: Do I need to crimp any hoses myself?
 A: No — all hoses are pre-crimped and clocked, saving you time and tools.

Q: What else do I need to install this kit?
 A: Just the compressor (either SD7H15 or 508 style) and one of our compatible Kwik brackets. A new dryer is included. The OEM liquid line will be reused. Everything else is included.

Q: Can I install this in a weekend?
 A: Absolutely. With clear instructions and no need to hunt for parts, this is a true weekend install.

Q: Why shouldn’t I open the drier early?
 A: The drier contains desiccant that absorbs moisture. If opened too early, it becomes ineffective. Only unseal it right before pulling the vacuum and charging the system.

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Kwik Performance OBS AC Hose Kit Installation Instructions

Here is how to install the Kwik Performance OBS AC Hose kit

Kwik Performance Inc.

AC Hose Kit (88-90) OBS Chevy - Sanden HD - K10708

$295.00 USD

Bolt-On A/C Hose Kit for 1988-1990 OBS Chevy Trucks (Sanden 508/709 HD Compressor)

Connect to your factory AC system with new hoses designed specifically for 1988-90 OBS Chevy trucks. This kit requires a condenser with (1) male and (1) female connection at the condenser. 1990 was a changeover year, if your truck has two male connectors at the condenser check out our AC Hose Kit (90-93) OBS Chevy - Sanden HD - K10670. 

 

Key Features

 

For use with Kwik Performance AC brackets using Sanden HD 508/709 AC compressors:

LS wide mount:

K10470   Corvette spacing

K10471   F-body spacing

K10472   Truck/LS3 Camaro spacing

LT - L83/86 Gen 5 Trucks:

K10702   (14-19) AC-Alt/PS

Big Block Chevy M4 System:

K10255   AC-Alt/PS Type 2 

K10654   AC-Alt/PS P-series

 

Click on image to view our OBS condenser guide

Click below to view our AC wiring instructions

View product