ACUITY Replacement Air Filter for 1891 Cold Air Intake Kits
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Delivery and Shipping
Delivery and Shipping
Standard Shipping (UK):
Expect delivery in 2–3 working days. We may upgrade your order to Express at no extra charge depending on cart value, location, or items ordered.
Express Shipping (UK):
Sent via premium courier (DHL, UPS, Parcelforce, or FedEx). Most orders placed before 1PM (Mon–Fri) are dispatched the same day for next working day delivery (not guaranteed). Orders after 1PM are shipped next working day.
A working day is Monday–Friday, excluding UK public holidays.
Couriers may deliver on weekends at their discretion, but this is outside our standard policy.
Tracking details will be provided when your order ships.
Stock Information
Stock Information
Please check the stock status before ordering.
A green status means the item is in stock and has been recently verified.
If a product is out of stock or showing “contact us for ETA” just get in touch with us and we’ll give you an accurate restock estimate.
We aim to keep as many products in stock as possible, but due to low demand or special-order items, some products are only available to order in upon request.
Easy Returns
Easy Returns
RHD Performance accept returns on new, unopened products within 30 days of the day you receive your order. To organise your return and get an RMA (Return Merchandise Authoriation) number, please contact us here.
This does not affect your statutory rights.
- Direct replacement for the filter used on ACUiTY's 1891 Curl Control Intake Kits for the 2012-2015 9th Gen Honda Civic Si
- 6" (152mm) opening, ideal to mount to a 6" velocity stack
- 5" (127mm) overall height, 7.5" (190mm) max-width
- Washable, reusable, cotton gauze construction
- Includes hose clamp for filter
- Red filter element with black rubber
This is the same filter used in all of ACUiTY's 1891 Curl Control cold air intake systems for the 2012-2015 9th Gen Honda Civic Si. If your old filter has become damaged or clogged, this is a perfect way to get the intake refreshed and working like new. The filter features a 6" (152mm) opening, ideal to mount to a 6" velocity stack. The filter has a 5" (127mm) overall height and 7.5" (190mm) maximum width. The filter is washable reusable and features red cotton-gauze filter element construction. A hose clamp is included with each filter to help affix it to your velocity stack or intake inlet.
Compatibility
- 2012-2015 9th Gen Honda Civic Si with ACUiTY 1891 CAI system installed
- May fit other vehicles/applications
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