ACUITY 6” to 3.5” Aluminum Velocity Stack
Couldn't load pickup availability
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.
- 6" (152mm) inlet with barb feature to help better secure air filter
- Reduces to 3.5" (89mm) outlet
- 2.35" (58mm) overall height
- Parabolic reduction for improved flow
- 5052 aluminum construction with matte black coating for corrosion resistance
- Great for adapting a 6" filter to a 3.5" pipe or for reducing turbo inlet losses
Spun from 5052 aluminum to a parabolic profile, this velocity stack is a great way to adapt a filter with 6" (152mm) opening to a 3.5" tube or to simply reduce inlet losses on a 3.5" (89mm) tube or turbo inlet. Often, spun velocity stacks don't feature beads to help retain filters, leading to poor filter fitment. And with its 1.3mm (0.05") wall thickness, it's perfect for welding to industry-standard 0.060"-wall aluminum tubing if making a custom intake setup. ACUiTY's velocity stacks feature a rolled bead on the large end and a flared outlet on the small end to make sure your filter and coupler stay attached. Additionally, a durable, matte black, painted coating is applied to each velocity stack for corrosion protection.
Compatibility
Compatible with cone-style air filters with a 6" inside diameter and 3.5" inside diameter silicone couplers
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
