SKU: 27097959061

Flow Designs MK4 Focus ST-Line Flow-Lock Rear Diffuser

$171.00 $190.00
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Ships within 48 hours · Estimated delivery Jul 15 - Jul 20

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Description

Flow Designs MK4 Focus ST-Line Flow-Lock Rear DiffuserSuits MK4 Focus St Line Models INSTALL DOES NOT REQUIRE BUMPER REMOVAL Details: Get the Flow Lock Rear Diffuser for your Ford MK4 Focus ST Line, which shares the same durability and technology as our renowned WRX, Golf GTI & Hyundai i30N line up which is trusted by car enthusiasts worldwide. The rear valance and diffuser fins will clear the Focus ST dual exhaust and rear bumper removal is not necessary for installation of the diffuser. The Flow Lock


Suits MK4 Focus St-Line Models

INSTALL DOES NOT REQUIRE BUMPER REMOVAL

Details:

Get the Flow-Lock Rear Diffuser for your Ford MK4 Focus ST-Line, which shares the same durability and technology as our renowned WRX, Golf GTI & Hyundai i30N line up which is trusted by car enthusiasts worldwide. The rear valance and diffuser fins will clear the Focus ST dual exhaust and rear bumper removal is not necessary for installation of the diffuser.

The Flow-Lock interlocking system allows for the final assembly of the diffuser fins without tools or fasteners. A simple push and click and the kit is assembled and ready for installation - this means zero exposed hardware giving you the cleanest look for your MK4 Focus ST rear bumper. 

Valance is installed to the car through bolts and nuts while the Flow-Lock diffuser fins simply click into the valance (once locked into the valance it is secure). It is also possible to install when your car is on the ground.

Kit Includes:

  • MK4 Focus ST-Line Flow-Lock Rear Diffuser & Diffuser Fins
  • 2 Flow Designs stickers
  • Fitting kit with black stainless hardware

Material & Finish:

  • Valance: Finish available in gloss black, or scratch-resistant textured matte black
  • Diffuser Fins: Textured Finish

Install Instructions (PDF)

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
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
SKU: 27097959061

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4.7 ★★★★★
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Samridhi Rai
Lowell, US
★★★★★ 5
Stylish & Comfortable Linen Blend Shirt with Great Fit and Durable Feel
Size: Small, Color: Light Beige
This Amazon Essentials linen blend shirt is a really nice addition to my wardrobe. The relaxed fit sits comfortably without feeling too loose or shapeless, and it drapes well on the body. The wide sleeves and adjustable waist add a stylish touch, making it look both casual and slightly dressed-up at the same time. The fabric feels good—light, breathable, and perfect for everyday wear. It has that easy, airy feel that works really well for warm weather while still looking put together. After the first wash, I was happy to see that the quality stayed the same. No noticeable shrinking, fading, or change in texture, which gives confidence that it will hold up well over time. Overall, it’s a simple but very flattering shirt that combines comfort, style, and good durability. Great for everyday outfits or casual outings where you still want to look a bit polished.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 13, 2026
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Verified Purchase
J. D. Robinson
Grantham, US
★★★★★ 5
Sizing Varies, But an Amazing Tee if you get the right size!
Size: Large, Color: Navy
I ordered this in a size Large, my recommended size per Amazon and the size chart, it was so small through the underbust area that I could not wear it. I then ordered an XL and it is huge! The XL is too big everywhere, but especially through the bust! For your reference the bust line in the XL measures 42" pit to pit. I am going to try again to order a Large and see if perhaps I just got one that was sized incorrectly. This tee is so cute. I love the fit, the neckline, the slight flare at the hem. It's super cute and offers a great feminine look and feel. The material is amazing. Super soft, perfect non-clingy drape, opaque, lightweight . . . there's nothing not to love here!
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Reviewed in the United States on October 6, 2025
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Lovetoshopp49
West Palm Beach, US
★★★★★ 5
Honest review of the Amazon Essentials Women’s Slim Fit Cotton Tank Top
Size: Small, Color: White
This Amazon Essentials Women’s Slim Fit Cotton Tank Top is true to size. Nice and soft layering piece. The boatneck neckline gives the top an elegant look. I got the top in tan, white and black because of its simplicity as well as versatility. You need this top in your wardrobe for sure!
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Reviewed in the United States on May 11, 2026
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Rebecca B.
Grantham, US
★★★★★ 4
Good fit. Inexpensive chic look
Size: Small, Color: White, Size: Small, Color: White
Great fit and very flattering. I am a small and bought a small. After 4 washes it definitely looks a bit worn…I wear it with trousers for work. I will now be wearing it more casually since it looks a bit more worn. Still worth it for the price and comfy. Colors are what they look like online. I’m 5’6 130 lb
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Reviewed in the United States on July 26, 2025
K
Verified Purchase
Kelsea Wolf
Louisville, US
★★★★★ 5
Must have basic
Size: Large, Color: Black
I am so impressed with these Amazon shirts! The material is incredibly soft — like that perfect broken-in tee you’ve had for years but without the wear and tear. They’re lightweight but not thin or see-through, and they wash really well with no shrinking or losing shape. What I love most is how versatile they are. They’re the kind of basics that instantly become a staple in your closet — easy to dress up with jeans and a cardigan, or throw on with leggings for a comfy day out. The fit is flattering without being tight, and they hold up throughout the day without stretching out or looking sloppy. If you’re looking for comfortable, everyday shirts that feel amazing and go with everything, these are absolutely worth it. I’ve already ordered more colors!
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Reviewed in the United States on November 27, 2025

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