Q: Can I do an exchange?

Absolutely! We understand that you may have chosen the wrong size or style MAF housing so we offer easy exchanges. To expedite an exchange, you can purchase the correct part and you will get your refund once we receive the original, uninstalled order. Please ship to: Performance MRP 23 Catamount Road PO Box 5 Pittsfield, NH 03263

Q: How do I do a return?

Just go to our website and click on the returns tab at the top and follow the steps. If you have trouble, email Ashley@mrpmanufacturing.com. Please note we cannot process labels for international returns.


Or click below!


Q: What is an air straightener, and what are they used for?

Performance MRP honeycomb air straighteners screens, available in 5mm (3/16") & 6mm (1/4") cell sizes, are aerospace grade 5052 aluminum honeycomb. Our air straighteners are suitable for high-temp applications, they will hold up to being exposed to fuels as well as methanol injection. Our air straightener screens are used to aid in creating a laminar air flow at the mass air flow sensor. This will improve readings “fuel trim” from the MAF sensor, that ECU is seeing. Fix lean and rich spikes, increase throttle response, and improve idle.

Q: How do I measure for a screen?

Measure the outer diameter (OD) of where the screen will be installed. We use calipers but a ruler/tape measure will work, just round up - material can always be trimmed off but it can’t be added..


Q: Which size screen do I need?

1/4” works well for most of our customers and is the default style we install in our MRP housings. 1/4” screens tend to be easier to install if you are doing it yourself.

Q: What is the difference in the screen cell sizes?

The smaller screen size (3/16”) has a greater air-straightening effect. This is typically suggested for customers with particularly challenging MAF signal issues. Examples are if the MAF sensor is located very close to sharp bends, throttle bodies, turbo chargers, etc.

Q: How do I install an air straightener in my intake or MAF housing?

Your air straightener screen should be installed in the intake track before the mass air flow sensor. Typically air straighteners are installed 2-4 inches from the sensor. The air straightener screen can be installed using glue, epoxy, by brazing, or riveting. Performance MRP installs all of our own air flow straightener screens using rivets approx. 3" from the sensor with great success. Do not leave any bends between the screen and sensor and not let the screen touch the sensor.

Q: Is tuning required when I install a larger/smaller diameter mass air flow housing?

Tuning is application dependent. Generally speaking, tuning will be required when you increase/decrease the diameter of your mass air flow housing.

Q: How do I know the outside diameter (OD) of my OEM MAF housing?

Measure it! A ruler/tape measure will do the job. If you don't have your MAF housing, measure the outside diameter (OD) of the OEM throttle-body or the Inner Diameter (ID) of whatever held the OEM MAF housing. We do not keep track of this info because there are too many applications. 

You can also use the string trick if you can't uninstall your pieces to measure the circumference. Wrap a string around the MAF housing and then measure that length against a tape measure or ruler and divide that number by 3.14 to get your outer diameter (OD).


Q: How do I know which MAF housings or flange I need for my vehicle?

Please refer to the home page’s vehicle identifier and enter your vehicle information. If nothing comes up, please email Ashley@mrpmanufacturing.com to determine the correct vehicle fit-up, or shoot us a message on Facebook!


Q: Why is the description on my receipt different than what I ordered?

Check your SKU/ITEM #. Our parts fit many makes and models because sensors are utilized across a variety of vehicles. Our shipping system sometimes pulls a different description than what you ordered on the website. However, as long as your SKU matches what you ordered, you're good to go!

Q: Is my item in stock?

We work hard to keep our inventory accurate and our items well-stocked and ready to ship! We typically ship within 1 business day of your order. If you see the item online, it’s in stock!

Q: You do not have the diameter/size/length that I need of a product?

We frequently fabricate one-off versions of our parts for home mechanics, and for performance shops. Please email us, Ashley@performancemrp.com, with the details of what you need for your project and we will reply promptly.

Q: Do you manufacture custom parts?

Yes, we frequently work on custom projects for individuals as well as manufacture proprietary parts for performance companies, Performance MRP has a full service machine shop that specializes in prototype & production machining. Please email, Ashley@performancemrp.com, with a description of what you need, a blueprint or drawing of the part if possible, and any photos that you may have. We will reply promptly.

Q: Will deleting the secondary air injection system cause my check engine light to come on?

Yes, deleting your secondary air injection system will cause your check engine light to come on. This can be corrected with tuning. Modifying any part of your emissions system is for off-road use only vehicles, please be aware of your local laws before modifying your vehicle

Q: Do you offer wholesale pricing?

Performance MRP offers wholesale pricing to re-sellers as well as fabricators that are interested in purchasing quantities of our products. Please Contact Us if you are interested in becoming a wholesale customer. Please include business name, first/last name, phone number, address, name of product/s that you are interested in, & an estimated quantity of products that you are interested in purchasing. Please send an email to ASHLEY@MRPMANUFACTURING.COM

***Setting up a wholesale account will typically take less than 24 hours. 

Q: Can I tag you in social media?

Yes! We love when our customers tag us in their cars and projects! You can follow Performance MRP on Facebook and Instagram. Facebook.com/PerformanceMRP Instagram.com/PerformanceMRP

Privacy Policy

Q: Updating Personal Information

If you are a registered member at Performance MRP, you can change your personal information at any time by updating your information at checkout.

Q: Links

This Privacy Policy applies only to the information collected on this site. Our site may contain links to or from other websites and you should be aware that we are not responsible for the privacy practices of other websites. We encourage you to read the privacy policies of other websites linked to the site.

Q: Information Collection and Use

Performance MRP is the sole owner of the information collected on this site. When you shop on our website, we collect personal information from you such as name, address, email, phone number and/or credit card information. This information is used for billing purposes for filling customer orders, contacting customers to inform them of order status and sending promotional information. We will not sell, share, or rent this information to others in ways different from what is disclosed in this statement. Performance MRP collects information from our users at several different points on our website.

Q: Fraud Protection and Compliance with Law

We may disclose any information, including personally identifiable information, we deem necessary, in our sole discretion, to comply with any applicable law, regulation, legal process or governmental request. We may also exchange information, including personally identifiable information, with other companies and organizations for credit fraud protection and risk reduction.

Q: Cookies, IP Addresses, Pixel Tags, & Tracking Technology

Performance MRP may place a "cookie" on your computer's hard disk so we can recognize you as a return user and personalize your experience. A cookie is a piece of data that enables us to track and target our customers preferences. The cookie will be stored on your computer's hard disk until you remove it. We may also use temporary or "session" cookies to help you shop. These cookies will expire when you place an order. You can have your browser notify you of, or automatically reject, cookies. If you reject our cookies, you may still use the site, but you may be limited in the use of some of the features. Cookies can not be used to run programs or deliver viruses to your computer. In addition, we may use IP addresses to analyze trends, administer the site, track traffic patterns, and gather customer information.

Q: Contacting Us

We welcome your comments and questions about privacy. Please send an email to sales@performancemrp.com We are confident that your visit to Performance MRP is secure and safe. However, you may choose to call us directly to place your order over the telephone. Please call Customer Service toll free at 1-603-435-5337.

Q: Changes to This Statement

Performance MRP will occasionally update our Privacy Policy to reflect feedback from our customers, and our company. We encourage you to periodically review this statement to be informed of how Performance MRP is protecting your personal information.

Shipping & Returns

Q: What domestic shipping options are available?

Performance MRP ships via United States Postal Service (USPS) & UPS

Shipment Method Estimated Transit Time
USPS First Class Mail 2-7 business days
USPS Priority Mail 2-3 business days
USPS Priority Express 1 business day
UPS Ground 2-7 business days
UPS Standard 2-7 business days
UPS 2nd Day Air 2 business days
UPS 2nd Day Air A.M. 2 business days
UPS Next Day Air 1 business day
UPS Next Day Air Saver 1 business day
UPS Next Day Air Early A.M. 1 business day

*Estimated transit times only apply to the continental United States

*UPS does not deliver to PO boxes

Q: What could cause a shipping delay?

Shipping delays can occur if the wrong shipping address is provided. If the shipping company can not deliver the package we will contact you via email or phone.

Shipping time may vary during holidays. Shipping times may be affected by inclement weather.

Q: Do you ship to Alaska and Hawaii?

Yes, we ship to both Alaska and Hawaii. Shipping is via USPS or UPS

Q: Do you ship outside of the USA?

Performance MRP is now offering International Shipping. If your country is not currently listed, please email us at Ashley@mrpmanufacturing.com to complete your order.


Q: Is there a cost on returns?

Performance MRP truly believes in providing our customers with the most hassle free shopping experience possible, part of this belief includes hassle free returns. If an item needs to be returned please click on the returns portal link below, our system will automatically generate an RMA and we will cover the return shipping cost of your item. The amount of the refund will be based on the purchase price of the product.

*If an item is being returned due to Performance MRP shipping the incorrect item, we will reimburse purchase price, & shipping.

Q: How do I return a product to Performance MRP?



Please contact Performance MRP, sales@performancemrp.com, for return instructions if you do not wish to use the returns portal.