SKU: 94903519046

AOS-R, UNIVERSAL KIT

Sale price$118.77 Regular price$131.97
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Ships within 48 hours · Estimated delivery Jul 12 - Jul 17

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Description

AOS-R, UNIVERSAL KITA high powered modified engine tends to generate excessive blow by oil and gasses. In these cases, an ordinary small catch can may quickly fill with oil and not be adequate. Like the Radium Engineering Catch Cans, the AOS (Air Oil Separator) kit is responsible for keeping blow by oil and other pollutants out of the air intake and intercooler (if equipped) systems. The main difference is that an AOS system returns collected oil back into the oil pan so

A high powered modified engine tends to generate excessive blow-by oil and gasses. In these cases, an ordinary small catch can may quickly fill with oil and not be adequate. Like the Radium Engineering Catch Cans, the AOS (Air Oil Separator) kit is responsible for keeping blow-by oil and other pollutants out of the air intake and intercooler (if equipped) systems. The main difference is that an AOS system returns collected oil back into the oil pan so there is no servicing required.

IMPORTANT INSTALLATION NOTES:

-In order for the AOS to function properly, a port must be supplied on the engine for the oil to return through.
-The AOS must be mounted high enough in the engine bay so that the port on the bottom is higher than the oil return port on the engine.
-for heating purposes, engine coolant must be routed to the AOS-R to prevent condensation.

Without a properly designed AOS, water condensation can develop and find its way in the oil pan contaminating engine oil. Engine coolant lines are routed through the Radium Engineering AOS in a specially designed heating chamber (shown above). This keeps the AOS warm and prevents water from condensing inside. Because water is more dense than oil, there is an integrated water trap found around the bottom perimeter that prevents condensation from descending into the oil pan.

For AOS crankcase plumbing, the valve cover vent(s) are routed into the top inlet where the stainless steel condensing material separates the oil from the gasses. The filtered liquid oil is collected at the bottom of the AOS and drawn into the oil pan. Meanwhile, the clean crankcase air can either be vented to atmosphere (VTA) or recirculated to the turbo air inlet pipe. Shown below is a plumbing example.

With a properly operating system, the fluid level inside the AOS will be empty after sitting. If there is a possible return obstruction, simply unscrew the anodized billet aluminum dipstick for inspection. Conversely, the entire billet unit disassembles into 3 large pieces for servicing.

Benefits
-Effectively raises the octane and increases engine performance with cleaner inlet air
-Prevents oil buildup in the intake or intercooler system walls, throttle body, intake manifold, etc.
-Lowers hydrocarbon emissions

Included
-Machined alumium Radium Engineering AOS
-Anodized universal mount that permits 360deg rotation
-Two 5/16" barbed fittings for coolant lines
-Stainless steel hardware

Ports
Top Port: 7/8"-14 threaded for 10AN ORB fittings
Side Port: 7/8"-14 threaded for 10AN ORB fittings
Bottom Port: 7/8"-14 threaded for 10AN ORB fittings
Coolant Ports: 7/16"-20 threaded, includes two 7mm (or 5/16") barb fittings

Measurements
AOS Height: 6.94" (top of dipstick to bottom of AOS)
AOS Diameter: 3.45" Round
AOS Capacity: 20.3 oz (600mL)

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 94903519046

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Amy S
Chelsea, US
★★★★★ 1
Nice if the suction cups wouldn't have been deformed
Size: 7.125 x 2.875, Color: Brushed Metal
Update: The one I received had two suction cups deformed and wouldn't stick to the side of the sink. Realized this after placing it. Unreturnable. Perfect size. A little wider than the rest. Replacing my last one that didn't rust for years. It was fine except the hard water made the suction cups not stick otherwise it was lasting for years.
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Reviewed in the United States on April 2, 2026
J
Verified Purchase
Jack Tuckner
West Palm Beach, US
★★★★★ 5
3 suction cups that can hold a bottle of dish soap and a scrubber.
Size: 7.125 x 2.875, Color: Brushed Metal
Heavy Duty
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Reviewed in the United States on June 3, 2026
S
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South Berkshires, Massachussets
West Palm Beach, US
★★★★★ 3
Needs modification to work correctly.
Size: 7.125 x 2.875, Color: Brushed Metal, Size: 7.125 x 2.875, Color: Brushed Metal
It is okay, but the brushes fall through the holes' making them hard to retrieve. The only way to get them out of the holder is to pull up on the bristles or push the handle from the bottom. Both don't work well. My solution is simple, just install a "stop" below the holes. My solution is ugly but works. It took me about 15 minutes to modify.
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Reviewed in the United States on April 4, 2026
A
Verified Purchase
Awesome quality, they stay on your feet while you’re running hard, I mean on your ankles great socks 🧦
Battle Creek, US
★★★★★ 5
Quality and design 👍
Size: 7.125 x 2.875, Color: Brushed Metal
Fit great in our kitchen sink, good quality , very good design.
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Reviewed in the United States on May 9, 2026
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Donna Roberson
Phoenix, US
★★★★★ 5
Size was perfect
Size: 7.125 x 2.875, Color: Black
It's a perfect size for my sink. Well made. I can fit my handle dish scrubber, a sink stopper, a sponge and a scrubber in to comfortably.
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Reviewed in the United States on April 22, 2026

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