SKU: 94903519046

AOS-R, UNIVERSAL KIT

Sale price$118.77 Regular price$131.97
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Ships within 48 hours · Estimated delivery Aug 6 - Aug 11

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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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4.3 ★★★★★
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J
Verified Purchase
Jason
Carnegie, US
★★★★★ 2
I did not like it.
Style: Charging MagSafe Mount
I was hoping this would work well, but I’m not really impressed with it. The magnet is strong and definitely holds the phone well. It also charges the phone very well. It is also fairly easy to install. That’s about the end of the pluses. Using the rubber devices they give you to help run the charging cable is something to be desired. They have not done a good job of sticking. Either it comes completely off from the car, sticky part and all, or the sticky par stays attached to the car and the rubber cable holder comes off without the sticky or Velcro part. When it’s holding the phone, if there is any kind of vibration, it shakes the phone even more. It doesn’t seem to want to stay tight against the screen. I keep having to re-tighten it so it won’t fall off. I’m already looking for another phone holder.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 22, 2025
A
Verified Purchase
Autistic Alvin
Bozeman, US
★★★★★ 5
Looks good, fits good, works good
Style: Charging MagSafe Mount
I LOVE it! I bought the one with the cord at first and then returned it for the one without the cord and I'm 100% in love with it. It looks good, the magnetic strength is awesome and I love the fact that it can swivel around too
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 10, 2026
B
Verified Purchase
Ben
Louisville, US
★★★★★ 1
Very slow, but good quality
Color: 2White
It works as expected, but my phone says that it is a slow charger even when plugged in my fast charger brick. False advertising. Really wish it charged a little faster
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
L
Verified Purchase
Lin
Lake Worth, US
★★★★★ 1
Slow As a Turtle
Color: 2White
Super slow charging. After 10 minutes, my phone only charged 3%. I plugged my original charging cord into the same 65W charging block and after 2 minutes, it had charged nearly 10%.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 22, 2026
K
Verified Purchase
Kelly Wilson
Whiting, US
★★★★★ 1
Do not buy, it gets very hot quickly
Color: 2White
I gets hot very fast, bas product I will be returning
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026

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