Skip to content
HARRYS EURO - NZ's Largest Online Performance Parts Store
HARRYS EURO – NZ's Largest Online Performance Parts Store

MK3.5 Focus ST (Facelift) Rear Diffuser Set-Flow Designs

$590.00
Material Finish
This product is ready to order. Orders will have an estimated 2-week lead time.


Suits MK3.5 Focus ST model

INSTALL DOES NOT REQUIRE BUMPER REMOVAL



Details:

Each diffuser fin is reversible giving you 2 style choices to choose from. Diffuser fins are also slotted which gives you the flexibility to set the depth. Pull them out for an aggressive look or push them in to keep it neat and tighten when done.

Diffuser fin profiles can be set before or after installation, adjustment can be done on the car by loosening a few fasteners (refer to fitting diagram).

This 8-piece set includes a pair of adjustable diffuser winglets and a pair of spats for everything to mount to. Everything is pre-drilled and there is no need to remove the rear bumper for installation, only basic tools and knowledge is required.

Don’t want the fins? Click here


Kit Includes:

  • MK3.5 Focus ST (Facelift) rear diffuser set
  • Rear Adjustable Rear Diffuser Winglets (Left + Right)
  • 2 Flow Designs Stickers
  • Fitting kit

Material & Finish:

  • Valance: 10mm thick polyethylene composite, bevelled edges
    Finish available in gloss black, or scratch-resistant textured matte black
  • Flow-Lock diffuser fins: 4.5mm thick textured ABS

Install Instructions (PDF)

  • Unsure about fitment?
    Chat with our performance expert
  • NZ's largest Online performance parts store
  • All products backed by manufacturer warranty
  • 100% genuine parts
  • Hassle-free 30-day returns & refunds
  • Competitive pricing
    Seen a better price elsewhere? Let us check
  • Workshop installation available
  • Fast 1-3 days dispatch on in-stock items
  • Shipping from only $11.90
  • Click & collect available
  • Dealer-level MTA workshop
  • Expert tuning, upgrades, and servicing
  • Visit us: 15a parkway drive, Rosedale, Auckland
  • Open 6 days

Harrys Euro

150+ Brands · 30,000+ Performance Parts

Proudly Serving Kiwi Drivers for Over 9 Years
Store & Workshop
Workshop

Parts + services, under one roof

Shop performance parts in-store or online, then have them fitted and tuned by the same team. No referrals, no second trips.

Performance

Dealer-level workshop, MTA assured

Fully equipped to support late-model European vehicles — diagnostics, servicing, and performance builds done right.

Parts

Built for real-world performance

We fine-tune high-performance machines to suit how you actually drive.

Happy Customers

4.8
Based on 146 Google reviews
as of 01/05/2026
×

Follow Our Journey

Live build updates, event coverage, and behind-the-scenes — on Instagram.

Follow Us on Instagram ↗