GT Mustang S550 FM Flow-Lock Rear Diffuser

Suits 2015-2017 Ford Mustang GT S550 FM

INSTALL DOES NOT REQUIRE REAR BUMPER REMOVAL

Details

Experience Flow-Lock rear diffuser for your Mustang S550 FM, sharing the same durability and technology as our renowned WRX, Golf GTI & MK3 Focus RS line up which is trusted by car enthusiasts worldwide. The rear valance and diffuser fins will clear the Mustang S550 FM dual exhaust tips with ease, and rear bumper removal is not necessary for installation of the diffuser. 10 year warranty applies for the rear valance (excludes ABS fins).

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 Mustang S550 FM rear. Front lip splitter is also available for the Mustang S550 FM.

No more L-brackets, no additional exposed hardware and no double-sided tape, experience the Flow-Lock difference today!  

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.

GT Mustang S550 FM Rear Diffuser Kit Includes:

• Mustang S550 FM rear diffuser (rear valance and Flow-Lock diffuser fins)
• 2 Flow Designs stickers
• Fitting kit

GT Mustang S550 FM Rear Diffuser Material & Finish:

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

Others Who Own This Kit:

Tell me about ABS plastic!

Please note that although all our precision-made ABS accessories are extremely strong and durable, they do not hold the same shatterproof label as our 10mm thick polyethylene composite splitters. The accessories are manufactured in ABS with the intention that they will be lighter, bolt-on attachments that will improve aesthetics and are easily replaceable if they become damaged from varying road conditions. 

Install Instructions (PDF)