★★★★★ 5
Very cold
Color: 01 - Light Grey
Super cold
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Reviewed in the United States on February 25, 2026
HKS 4mm Vaccum FilterSKU: 4599 RA017 UPC: 4957266556245 HKS 4mm Vacuum Filter 4599 RA017 Universal Fit Turbocharged JDM Vehicles The HKS 4mm Vacuum Filter installs inline on vacuum lines to block dirt particles from reaching boost solenoids blow off valves and controllers. It fits universal 4mm ID hoses on performance vehicles including Subaru WRX STI Nissan Skyline GT R 350Z and Toyota Supra. This filter maintains consistent vacuum signal flow for dependable boost
Quick Dispatch:
Your HKS 4mm Vaccum Filter orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
Order Tracking:
You'll receive a tracking link by email once your HKS 4mm Vaccum Filter ships.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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4.1 ★★★★★
Based on 2493 reviews
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Product Reviews
★★★★★ 5
Cool pillow vase
Color: 01 - Light Grey
Nice cool material and stays kn the pillow well due to the snaps.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 21, 2026
★★★★★ 3
Ugly
Color: 01 - Light Grey
The light blue color looks like a hospital gown. Keeps cool but I don't think I can bear looking at it.
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Reviewed in the United States on May 9, 2026
★★★★★ 5
Cooling pillowcase
Color: 01 - Light Grey
These cooling pillowcases are fabulous. I just have one complaint they snap at the end instead of having a zipper, which could be uncomfortable if you’re laying on that snap. Also, it’s very hard to unfasten.
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Reviewed in the United States on December 5, 2025
★★★★★ 5
Comfy and cooling pillow cases for sleeping
Color: 01 - Light Grey, Color: 01 - Light Grey
Cooling cover for my pillow, great quality and super soft. Helps with my sleep. Have eye mask as a gift too. Highly recommended.
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Reviewed in the United States on December 28, 2025
