Fits all variation models including RHD, international models, etc.
Fits PRL Motorsports High Volume Intake System only
Compatible with factory turbocharger inlet pipe or PRL Motorsports titanium inlet pipe
Installation:
PDF - 2017-2021 Honda Civic Type-R High Volume Intake System Installation Guide 
Patent No. D902,255
Important Notes:
- Standard Bore MAF option does not require ECU calibration
- Big Bore MAF option requires Big Bore MAF scaling ECU calibration
Technical Notes:
The PRL Motorsports High Volume Intake System Big Bore MAF housing upgrade is the largest MAF housing on the market, rated for 600+ horsepower and offering a 47% increase in airflow compared to the factory MAF housing or standard bore HVI MAF. Our engineers were able to profile the volute and position the MAF sensor flange in an optimal location to keep fuel trims extremely stable. This requires tuning/MAF scaling and is only compatible with our High Volume Intake System. This upgrade is intended for customers aiming for 450+ horsepower.
Customers can also convert from a Big Bore MAF housing to a standard bore MAF housing.
Kit Contents:
- (1) Billet aluminum MAF housing
- (1) 4-ply silicone hose
- (1) 304 stainless steel worm clamp
- (1) Injection-molded Evap fitting
Before Placing an Order
〇Regarding Import Consumption Tax
At the Shaftoya shopping site, we pay the import consumption tax incurred at the time of import on your behalf, so there are no additional charges beyond the total amount paid at checkout.
〇Confirmation of Compatibility
All product databases are based on North American vehicles (USDM). Please confirm whether or not they can be installed on Japanese vehicles (JDM) before ordering. (If you are unsure if the listed product is compatible with your vehicle, please feel free to contact us. Our support team will investigate for you.)
If you order without confirming compatibility, we cannot accept returns due to incompatibility.
Please note that even if products are sorted by selecting the year, manufacturer, and vehicle model using the tabs on our top page, it does not necessarily mean they are compatible with Japanese-spec vehicles without modification.
All products are translated into Japanese using translation software. As there may be confusing expressions, please contact us before ordering if you have any questions.
○Regarding Shipping
Shipping fees are paid at the time of settlement. Estimates for shipping fees are calculated automatically when you enter your shipping address on the checkout page. For large items such as body parts, the automatically calculated shipping fee may rarely differ significantly from the actual cost. In such cases, we will contact you individually via email.
Basically, all products are shipped internationally from our U.S. warehouse. Unlike domestic shipping in Japan, international shipping takes about 7 to 14 days, so please order with time to spare. If you are in a hurry, please contact us in advance to confirm the delivery date. All products are transported by air. They are not shipped by sea.
○Regarding Japanese Vehicle Inspection (Shaken) Compatibility
All products we carry are basically designed and manufactured outside of Japan. Please note that they are not compliant with the "Japanese vehicle inspection system," and we cannot provide strength calculation sheets or similar documents for that purpose. Therefore, all parts are sold for use on "circuits, private property, or off-road," and please use them at your own risk.
○Regarding Warranty
Please check the contents immediately upon arrival. Since all products are shipped internationally from outside Japan, there may be shipping damage to packaging or products. We will handle returns, refunds, or exchanges only if you contact us within 7 days of receipt regarding damaged, defective, or incorrect items. Please understand that for products sold through us, warranty-related support will be handled "only through us." We do not handle support through other companies or distributors located in Japan.