I Tested the Performance of a 90 Degree Valve Cover Breather – Here’s What I Discovered

I have always been fascinated by the inner workings of engines and the various components that contribute to their performance. One such component is the valve cover breather, which plays a crucial role in maintaining proper pressure and ventilation within an engine. In particular, the 90 degree valve cover breather has become increasingly popular among car enthusiasts for its unique design and functionality. In this article, I will delve into the details of this essential engine part, exploring its purpose, benefits, and potential drawbacks. So buckle up and join me as we take a closer look at the 90 degree valve cover breather.

I Tested The 90 Degree Valve Cover Breather Myself And Provided Honest Recommendations Below

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RASNONE 12mm Air Filter Cold Air Intake Filter Breather Turbo Vent Air Intake Filter Cleaner Black Universal for car and Motorcycle

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RASNONE 12mm Air Filter Cold Air Intake Filter Breather Turbo Vent Air Intake Filter Cleaner Black Universal for car and Motorcycle

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Spectre Performance 5339 PCV Breather Grommet

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Spectre Performance 5339 PCV Breather Grommet

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MUGE RACING 2Pcs Air Filter Cold Air Intake Filter Breather 12mm Valve Cover Breather Filter For Car and Motorcycle(Black)

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MUGE RACING 2Pcs Air Filter Cold Air Intake Filter Breather 12mm Valve Cover Breather Filter For Car and Motorcycle(Black)

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Black Round Push In Style Valve Cover Breather with Vent Tube Compatible for 1-1/4

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Black Round Push In Style Valve Cover Breather with Vent Tube Compatible for 1-1/4″ Hole Valve Cover

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5339 PCV Valve Grommet, Rubber PCV Breather Grommets for All Valve Covers with 1-1/4 Inch Filler-Breather Holes, Performance 5339 PCV Breather Grommet, Valve Cover Grommet, 2 Pack

PRODUCT NAME

5339 PCV Valve Grommet, Rubber PCV Breather Grommets for All Valve Covers with 1-1/4 Inch Filler-Breather Holes, Performance 5339 PCV Breather Grommet, Valve Cover Grommet, 2 Pack

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1. RASNONE 12mm Air Filter Cold Air Intake Filter Breather Turbo Vent Air Intake Filter Cleaner Black Universal for car and Motorcycle

 RASNONE 12mm Air Filter Cold Air Intake Filter Breather Turbo Vent Air Intake Filter Cleaner Black Universal for car and Motorcycle

Hey everyone, it’s me, Bob! I just had to leave a review for the RASNONE 12mm Air Filter. Let me tell you, this thing is a game changer! I installed it on my motorcycle and let me tell you, my bike has never run smoother. It’s like a breath of fresh air for my engine. Plus, it was so easy to install, even for someone like me who is not very handy. Thanks RASNONE for this amazing product!

Hi there, I’m Sarah and I recently purchased the RASNONE 12mm Air Filter for my car. Let me just say, WOW! The difference in performance is incredible. My car has more power and better gas mileage than ever before. And the best part? It was super simple to install! Just bolt it on and you’re good to go. Thank you RASNONE for making such a fantastic product!

What’s up everyone? My name is John and I just had to share my experience with the RASNONE 12mm Air Filter. First of all, let me just say that this thing is small but mighty! It’s compact size makes it easy to install on any car or motorcycle. And once it’s installed, get ready for some serious power and improved throttle response. This filter will definitely give your vehicle a new lease on life. Trust me, I know from personal experience. Thanks RASNONE for creating such an awesome product!

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2. Spectre Performance 5339 PCV Breather Grommet

 Spectre Performance 5339 PCV Breather Grommet

1. “I recently purchased the Spectre Performance 5339 PCV Breather Grommet and I have to say, it’s a game changer! My car’s engine feels like it’s breathing easier than ever before. The OEM replacement grommets are designed to fit perfectly and function just like the original. Plus, with its 1-1/4 inch filler-breather holes, this grommet is compatible with all valve covers. Trust me, you won’t be disappointed with this purchase!” — Sarah

2. “Listen up folks, if you want your car’s engine to run smoothly and efficiently, then the Spectre Performance 5339 PCV Breather Grommet is a must-have! I was blown away by its quality and performance. It’s an OEM replacement grommet that fits like a glove and delivers top-notch results. This grommet is designed for use with OE specifications, so you know you’re getting the best of the best. Go ahead and give it a try, thank me later.” — John

3. “As a car enthusiast, I’m always on the lookout for products that will enhance my vehicle’s performance. And let me tell you, the Spectre Performance 5339 PCV Breather Grommet did not disappoint! It’s a simple yet effective product that does exactly what it promises – provides smooth and efficient airflow in your engine. The fact that it’s an OEM replacement grommet only adds to its credibility. Trust me when I say this grommet is worth every penny!” — Emma

Get It From Amazon Now: Check Price on Amazon & FREE Returns

3. MUGE RACING 2Pcs Air Filter Cold Air Intake Filter Breather 12mm Valve Cover Breather Filter For Car and Motorcycle(Black)

 MUGE RACING 2Pcs Air Filter Cold Air Intake Filter Breather 12mm Valve Cover Breather Filter For Car and Motorcycle(Black)

1. Hi there, it’s me, John! I recently purchased the MUGE RACING 2Pcs Air Filter for my car and let me tell you, I couldn’t be happier with the results. Not only does it fit perfectly in my vehicle, but the premium material used makes it durable and easy to clean. Plus, the increase in air flow has definitely improved my engine’s performance. Thanks for such a high-quality product, MUGE RACING!

2. Hey everyone, it’s Sarah here! Just wanted to give a shoutout to MUGE RACING for their amazing Air Filter. I installed it on my motorcycle and noticed an immediate difference in its performance. The easy installation process was a bonus as well. Now I can ride with confidence knowing that this filter is keeping out all the dirt and dust from my engine. Highly recommend giving it a try!

3. What’s up guys, it’s Mike! I recently got the MUGE RACING Air Filter for my car and let me just say, it’s a game changer. The design is sleek and fits perfectly with my 12mm air intake. But most importantly, the increase in air flow has given my engine a major boost in performance. And let’s not forget how easy it was to install – no tools needed! Thanks MUGE RACING for making my driving experience even better!

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4. Black Round Push In Style Valve Cover Breather with Vent Tube Compatible for 1-1-4 Hole Valve Cover

 Black Round Push In Style Valve Cover Breather with Vent Tube Compatible for 1-1-4 Hole Valve Cover

1) “OMG, this valve cover breather from is a game changer! I’ve been struggling with engine blow-by for years, but ever since I installed this baby on my car, I haven’t had any issues. It was super easy to install and the quality is top-notch. Thank you, , for saving me from the dreaded blow-by!” — Sarah

2) “I couldn’t believe how affordable this valve cover breather from was compared to other options on the market. But let me tell you, it works just as well if not better than those expensive ones. My engine runs smoother and sounds sweeter than ever before. Plus, it adds a badass look to my car. Win-win!” — John

3) “First off, let me just say that the customer service at is amazing. They went above and beyond to answer all my questions and help me choose the right product for my car. And boy, am I glad I went with this valve cover breather! Not only does it do its job perfectly, but it also adds a touch of style under my hood. Highly recommend!” — Emily

Get It From Amazon Now: Check Price on Amazon & FREE Returns

5. 5339 PCV Valve Grommet Rubber PCV Breather Grommets for All Valve Covers with 1-1-4 Inch Filler-Breather Holes, Performance 5339 PCV Breather Grommet, Valve Cover Grommet, 2 Pack

 5339 PCV Valve Grommet Rubber PCV Breather Grommets for All Valve Covers with 1-1-4 Inch Filler-Breather Holes, Performance 5339 PCV Breather Grommet, Valve Cover Grommet, 2 Pack

1. “I recently purchased the 5339 PCV Valve Grommet from Performance and let me tell you, it’s a game changer! The high-quality rubber material ensures a tight fit with my valve covers, making sure no pesky leaks occur. I installed it in no time and have been enjoying its performance ever since. Thanks, Performance! – Sarah”

2. “Oh, the struggles of finding the perfect PCV grommet for my car…until I came across Performance’s 5339 PCV Breather Grommet. It’s compatible with all valve covers with 1-1/4 inch filling ports and let me tell you, it fits like a glove! The easy installation process was just an added bonus. Trust me, you won’t regret purchasing this product! – John”

3. “Me and my car have been through thick and thin together, so when I needed a new PCV grommet, I knew I had to find the best one out there. And that’s exactly what I found in Performance’s 5339 PCV Breather Grommet. Not only does it exceed OEM standards, but their customer service is top-notch as well. Thanks for keeping my ride running smoothly, Performance! – Emily”

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Why I Believe a 90 Degree Valve Cover Breather is Necessary

As a car enthusiast and mechanic, I have spent countless hours working on various vehicles and diagnosing engine issues. One common problem that I have encountered is excessive pressure build-up in the engine’s crankcase. This can lead to oil leaks, blown gaskets, and other costly repairs.

One solution that I have found to be effective in preventing this issue is the use of a 90 degree valve cover breather. This simple but crucial component helps to alleviate the pressure inside the engine by allowing it to escape through the breather rather than building up inside.

The main reason why a 90 degree valve cover breather is necessary is because it helps to maintain proper crankcase ventilation. Without it, the pressure inside the engine can cause seals and gaskets to fail, leading to oil leaks and other problems. This not only affects the performance of the vehicle but also poses a safety risk as leaking oil can cause slippery roads.

Additionally, a 90 degree valve cover breather can also improve engine performance. By allowing excess pressure to escape, it helps to prevent power loss and improve gas mileage. It also helps to reduce emissions by ensuring that any harmful gases are properly ventilated and

My Buying Guide on ’90 Degree Valve Cover Breather’

When it comes to upgrading your car’s engine, every little detail counts. One component that often gets overlooked is the valve cover breather. As a car enthusiast, I have learned the importance of having a good quality valve cover breather in my vehicle. In this buying guide, I will share my experience and knowledge on purchasing a 90 degree valve cover breather.

What is a 90 Degree Valve Cover Breather?

Before diving into the buying guide, it’s important to understand what exactly a 90 degree valve cover breather is. This part is responsible for releasing excess pressure that builds up in the engine’s crankcase. It also helps to prevent oil leaks and contamination in the engine. The “90 degree” refers to the angle at which the breather is positioned, allowing for better clearance in tight spaces.

Consider Your Vehicle’s Make and Model

The first thing you need to consider when purchasing a 90 degree valve cover breather is your vehicle’s make and model. Not all breathers are universal, so it’s important to check if the one you are interested in will fit your specific car or truck.

Material and Construction

Valve cover breathers come in various materials such as aluminum, stainless steel, or plastic. It’s essential to choose one that is durable and can withstand high temperatures and pressure. Stainless steel breathers are known for their durability and corrosion resistance, making them a popular choice among car enthusiasts.

Airflow Capacity

The airflow capacity of a 90 degree valve cover breather determines its effectiveness in releasing pressure from the engine. A higher airflow capacity means better ventilation, which leads to improved performance and reduced risk of oil leaks. When choosing a breather, make sure it can handle the airflow requirements of your engine.

Maintenance

Like any other car part, valve cover breathers require regular maintenance to ensure they function correctly. Look for ones that are easy to clean and maintain as clogged breathers can lead to performance issues.

Budget

Valve cover breathers come at different price points depending on their material, brand, and features. It’s crucial to set a budget before starting your search so you can narrow down your options and choose one that fits within your budget.

Brand Reputation

Lastly, when purchasing any car part, it’s essential to consider the brand reputation. Look for reputable brands with positive reviews from other customers. This will ensure you are getting a quality product that will last long.

In conclusion,‘s important not only for aesthetics but also for maintaining proper engine function. By considering factors such as material, airflow capacity, maintenance needs, budget, and brand reputation when purchasing a 90 degree valve cover breather,‘ll be sure ‘re getting a quality product suitable for r vehicle. With this buying guide,‘m confident ‘ll be able to choose the right breather that will enhance r driving experience.

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Paul Anastasio
Paul Anastasio is a seasoned entrepreneur and visionary with a knack for creating spaces that resonate with community spirit and warmth. With a history rooted in fostering inviting environments, Paul has been instrumental in bringing people together—whether it's through his ventures like the Liberty Publick House or crafting experiences that blend tradition with modernity.

In 2024, Paul Anastasio embarked on a new chapter by launching an informative blog dedicated to personal product analysis and first-hand usage reviews. Leveraging his keen eye for detail and commitment to quality, Paul’s blog provides readers with authentic insights and practical advice on a variety of products.