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Description
CSF All-Aluminium Triple-Pass Radiator - E46 M3The Racing & High Performance Division of CSF Inc. strives to build and engineer the most advanced, efficient, and reliable cooling systems in the world. CSF manufacturers a wide variety of sophisticated cooling systems with more than 250 different applications, ranging from high performance all aluminum direct fit radiators, intercoolers, and oil coolers, to complete custom manufacturing for racecars, power sports, off road, marine, and industrial
The Racing & High Performance Division of CSF Inc. strives to build and engineer the most advanced, efficient, and reliable cooling systems in the world. CSF manufacturers a wide variety of sophisticated cooling systems with more than 250 different applications, ranging from high performance all-aluminum direct-fit radiators, intercoolers, and oil coolers, to complete custom manufacturing for racecars, power sports, off-road, marine, and industrial use. All CSF cooling systems are designed and engineered to maintain optimal engine temperatures, even under the most extreme driving conditions.
With over 50 years of experience and over 40 million cooling systems sold globally, CSF has earned the industry reputation of being “THE COOLING EXPERTS”.
- Over 50 Years in Business
- ISO 9001 Certified – True Manufacturer
- Over 150,000 Radiators and Condensers in Stock over North America
- Over 650,000 Units Sold Annually, with Manufacturing and Warehousing Capacity for 1 Million Units
CSF prides itself on using the most advanced technologies, machines, and experienced personnel to design, develop, and manufacture the world’s best cooling systems. With three privately owned manufacturing facilities, and a global cooling network formed over the past 75 years, CSF houses the industry’s best machines and brightest minds. Our engineering staff designs many of the machines in-house, giving CSF the innovative edge when introducing new technologies to the industry.
PRODUCT INFORMATION
THE ULTIMATE COOLING SOLUTION FOR THE E46 M3
The CSF All-Aluminium Triple-Pass Radiator is the ultimate cooling solution for race and high-performance S54 powered E46 M3, including those with high cooling demands found in forced induction and high-power naturally aspirated engines.
This high-efficiency, all-aluminium radiator features an industry-leading core design with CSF's exclusive B-Tube technology along with an ultra-efficient 6.5mm multi-louvered fin height design.
To further the cooling efficiency, the integrated three-pass flow system guarantees the lowest possible outlet temperatures of any upgraded cooling system available for the platform today. Lab tested using CSF's in-house wind tunnel showed heat rejection results approximately 20% more efficient than the OEM unit - enough to keep coolant temperatures fully stabilized during the most demanding driving and high-ambient-temperature conditions.
Direct replacement for BMW part number 17102228941.
FEATURES
- Two-row 42mm core (dual core) featuring CSF's exclusive B-tube technology.
- Core features an ultra-efficient fin with 6.5mm fin height and multi-louvered design for maximum surface area contact.
- Triple-pass flow structure allows the coolant to flow across the core of the radiator three times before exiting, creating the lowest outlet temperatures possible.
- CNC-machined "quick-connect" inlet/outlet connections.
- CNC-machined brackets and fittings for superb fit and durability.
- All-aluminium drain plug.
- Hand-polished mirror finish.
- Drop-in fitment, requiring no modifications to install. Accepts all standard attached OEM components including "quick-connect" hoses, AC condenser, mounting brackets, and fan shroud.
Models
- 3 Series / E46 (1998-2006) / M3
- 3 Series / E46 (1998-2006) / M3 CSL
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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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]
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4.3 ★★★★★
Based on 28 reviews
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Product Reviews
★★★★★ 5
A Powerful Anxiolytic and Sleep-Enhancer
Size: 30 Count (Pack of 1)
I have tried a plethora of non-pharmaceutical anxiolytics, and I can say that CalmAid is by far the most effective. For me, the effects are comparable to a low dose of Ativan, but without the drugged feeling. Here are the main things I notice:
-Relaxed heartbeat. My heartbeat is usually very pronounced, but when I take lavender, it calms down dramatically.
-Quieter thoughts. I don't know how to describe this except to say that the "volume" of my thoughts is turned way down on lavender.
-Tremendous sense of calm. It's very hard to get upset or agitated or anxious while under lavender's influence.
-Improved sleep. I've suffered from horrible insomnia for a long time, and lavender is one of the only remedies that's had a noticeable effect. It doesn't make me drowsy per se, but it makes me so calm and relaxed that sleeping is easier.
However, there are some "side effects" (I use the term loosely) to be aware of when using this:
-Reduced energy. I suspect this is just the lavender calming my stress response and revealing fatigue that's already present to some degree, but it's worth noting. As I mentioned, lavender doesn't make me tired, but it makes me just want to kick back and chill rather than doing anything very active or exciting.
-Reduced motivation. Tying into the above, when using lavender I would often rather relax and watch a movie or read instead of getting work done. This is, I suspect, the dark side to being incredibly calm, whether it's lavender or something else making you that way. When you're calm, nothing seems to matter that much, including work. Ergo, you have less motivation. I think a certain amount of anxiety is healthy for optimal motivation, and lavender does away with that.
-For these reasons, I don't consider lavender an optimal anxiolytic for social anxiety, because energy and motivation are so important in social situations. I suffer from social anxiety, and have used lavender to deal with this at times, and though it does make me less anxious, it also makes me less social. I'd recommend something more like phenibut for social situations.
Despite these limitations, I still consider this an essential component in my anti-anxiety toolkit. I just try not to use it too often. Also, it's worth noting that human studies on lavender are somewhat lacking, and without more data, we don't know what the long-term effects of using it are. As with any drug (and I do consider this a drug), I think it should be used as little as possible. I would, however, much rather use this than a pharmaceutical anxiety medication.
A final note, on when to take it: I've found the best time to be 30 minutes before bed, on an empty stomach. The effects are more dramatic when taken well away from food, and if you take it before bed, you get the sleep-enhancing effects immediately, and the anxiolytic effects all throughout the next day (it lasts a looong time).
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Reviewed in the United States on November 2, 2017
★★★★★ 3
Effective, but gave me a headache
Size: 30 Count (Pack of 1)
I did and do like these. I find it takes the edge off my anxiety. Oddly enough, they give me a headache the next morning.
I tried only taking one pill at bedtime (instead of a second one halfway through the night); I made sure it wasn’t dehydration; I took electrolyte solution with it. I’ve pretty much eliminated anything else that a headache could’ve been caused by that I can think of.
They work well enough for me that on some nights it’s going to be toss up and I will still take it. But it’s kind of a drag knowing that something natural that works has a residual headache the next morning.
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Reviewed in the United States on August 1, 2025
★★★★★ 5
Day 1 and A Week ish Later
Size: 30 Count (Pack of 1)
I was taking Olly Stress Relief gummies for a while to control anxiety, hyperactivity and racing thoughts, and they worked great. Recently I noticed that they were becoming a lot less effective and started searching for alternatives. This was my first choice and I've only used it this morning. Took one pill. So far I have noticed a lighter mood, lack of racing thoughts, and an overall feeling of being slowed down. I can focus on conversations better, and it slightly enhanced my ability to taste, flavors seem more vibrant.. I am a bit more "lazy feeling" as others mentioned, and I did get the lavender burps. They're not horribly obnoxious for me, just a bit different. Burps lasted maybe half an hour. So far I like it.
Edit: it's been over a week now. The first few days I dealt with random headaches on and off, but did get benefits as stated above. After my body adjusted I stopped having the headaches and the "lazy" feeling. The lavender burps are still a thing and so is short term lavender breath right after taking a pill. You can describe it like a light lingering, kinda like toothpaste has a minty aftertaste, but lavender instead. For the most part I would still say it helps. It does not hit as hard as the first few days, but it is helping somewhat.
Benefits for me: Less overstimulation in public, better ability to relax after work, anxiety is more "inconvenience", easier to focus, deeper sleep, less irritability.
Cons for me: Short term lavender breath, vivid and unusual dreams, 2-3 day initial adjustment period for unpleasant side effects.
What I'm doing: Taking one pill around 7-7:30pm daily with lots of water. Taking late to sleep off any potential unpleasant initial effects, and get better sleep.
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Reviewed in the United States on August 31, 2024
★★★★★ 4
Finally, a Calm That Feela Natural
Size: 90 Count (Pack of 1)
I've tried a lot of "calm" supplements over the years, and Nature's Way Calm Aid is one of the few I've actuallt reordered.
I started taking it during a stressful stretch at work when my mind wouldn't slow down at night. Very shortly after taking it I felt more settled and less on edge. it takes the edge off without making me feel like I'm dragging through the day.
The softgels are small and easy to swallow with no weird aftertaste. This has been a real game changer for me.
If you're looking for something subtle but effective to help you stay calm and focused, CalAid is definitely worth trying.
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Reviewed in the United States on February 16, 2026
★★★★★ 5
Great Addition to My Daily Routine
Size: 16 Ounce (Pack of 1)
Excellent Quality MCT Oil — Great Addition to My Daily Routine
I purchased this MCT Oil and have been very pleased with it. It is light, smooth, and easy to add to my daily routine without changing the taste of my food or drinks. I especially like that it mixes well in coffee, tea, smoothies, and even oatmeal. It does not have a strong flavor or unpleasant aftertaste, which makes it very convenient to use every day.
Overall, I would definitely recommend this MCT Oil to anyone looking for an easy way to add healthy fats to their diet. It is high quality, easy to use, and a great value for the price. I would purchase it again.
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Reviewed in the United States on May 17, 2026