Radium Engineering 2015+ Subaru STi Air Oil Separator-Return Kit

Radium Engineering 2015+ Subaru STi Air Oil Separator-Return Kit

Marsoni

M251S

$213.72

Get it in 3 business days with 1 day shipping. Friday, May 29

Radium Engineering 2015+ Subaru STi Air Oil Separator-Return KitThe Radium air oil separator traps blow by oil before it can be sent back to the induction system. The collected oil is heated by the AOS to remove moisture, then allowed to drain back into the engine block, making this a zero maintenance system. Installation is done using factory mounting points. All required hardware, hoses and other items are included in the kit. This Part Fits: Year Make Model Submodel 2015 2020 Subaru WRX STI Base 2015 Subaru WRX

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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

This is nice, but not as nice as it looked in the pictures. Still very good value for the price. It's a medium-heavy weight Q-zip that looks good, but the pics online were much nicer looking. It's comfortable and warm, but just ok overall. I like that the collar is on the taller side assuming I would wear it golfing in cooler weather, but the pockets are kind of shallow. It fits well overall, but the dealbreaker for me is that the shoulders are tight with a Large size. I could wear this out casually, but I don't think I could swing a golf club. I am 5'10" and "husky" in my old age and my shoulders are probably on the broader side, but the rest fits well so I was surprised how snug the shoulders were.

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Reviewed in the United States on March 11, 2026

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PooShoe

Birmingham, US

★★★★★ 5

Cozy midweight

Color: Slate Blue, Size: Large

Nice fit. Cozy hand warmer pockets;but, FYI, not big enough for your phone.

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Reviewed in the United States on May 27, 2026

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AC23

Belleville, US

★★★★★ 5

Nice Sweater

Color: Army Green, Size: XX-Large

Very Light weight material. Comfortable and dressy looking.

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Reviewed in the United States on March 23, 2026

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Susan K Anderson

Chelsea, US

★★★★★ 5

Men’s mock golf shirt

Color: Lake Green, White, Black, Size: XX-Large

Fit & quality very good.

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Reviewed in the United States on June 4, 2026

Verified Purchase

Garfield S

Natrona Heights, US

★★★★★ 5

Nice Fit

Color: Black, White, Light Gray, Size: 3X-Large

I picked this up looking for something simple but clean, and it delivered. The fit is comfortable, the material feels solid, and it looks good without needing much effort. It’s one of those pieces you can throw on and still look put together.

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Reviewed in the United States on March 29, 2026