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New! MM Technical Services: MM’s Engineering Team will provide setup recommendations specifically tailored for your Mustang. Get help choosing options for a Maximum Grip Box, deciding on coil-over spring rates, selecting a brake master cylinder, and advice on converting your Fox to Hydroboost.

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New! MM now offers a tool for the giant nut securing a Mustang Hydroboost. This MM socket fits the 1-7/8" nut holding the Hydroboost to the firewall mount. Required when changing a Hydroboost unit.

New! MM's billet aluminum Pedal Box Spacer for Fox Mustangs. Replace the breakage-prone OEM plastic spacer when converting to manual brakes or Hydroboost.

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Home  ::  Packages  ::  Starter Boxes  ::  2015+ Mustang

Starter Box for S550 Mustang, 2015+

Starter Box for S550 Mustang, 2015+
Actual product may differ from photo.
  • Starter Box for S550 Mustang, 2015+

click on thumbnail to zoom

$1,804.92

  • Item # SBX6-61

Select Option(s):

Choose spring type





 
MM Caster Camber Plates

 
Eibach swaybar set

 
 

Prop65 Image

 

The Starter Box

This Grip Box from Maximum Motorsports includes the basic ingredients you need to significantly improve the handling of your S550 Mustang.

What improvements will I notice?
Less body roll when cornering, less brake dive, and quicker response to steering input. Ride quality will be firm, without the underdamped-at-speed feeling of the stock dampers.

Read about Turnology's installation and testing of MM's S550 Starter Box.

Includes:

Convertible GT note
Is your S550 a convertible GT? If so, select the 35145.140 Eibach Pro-Kit spring set.

Springs

Choose from the listed choices. Click on the links below for more info about each spring set:

  • 35145.140 - Eibach Pro-Kit for GT coupe & convertible
  • 4.14535 - Eibach Sportline for GT
  • 51691 - H&R Sport for GT
  • 51691.77 - H&R Super Sport for GT
  • 35147.140 - Eibach Pro-Kit for Ecoboost & V6
  • 4.14735 - Eibach Sportline for Ecoboost & V6

Convertible GT note
Select 35145.140, the Eibach Pro-Kit springs.

MM Caster Camber Plates
MM Caster Camber Plates are included as standard. Select "No, thanks" if you already have a set.

Eibach swaybar set
The Starter Box includes front and rear Eibach swaybars. Select "No, thanks" if you don't want them.

The Starter Box
This Grip Box gives your S550 Mustang a much sportier suspension feel without significantly degrading ride quality. You will notice less body roll when cornering, less brake dive, and quicker response to steering input. Ride quality will be firm, without the underdamped-at-speed feeling of the stock dampers.

Fits

  • 2015+ Mustang GT, Ecoboost, and V6
  • Coupe and convertible (35145.140 spring set only)

Does NOT fit

  • GT350
  • GT350R

We're working on FAQs for this product. If you have a question, please use our Contact Us page to email your question. We'll answer your question by return email, and also consider it for possible addition to this FAQ section.

  • Caster/camber plates are required for any lowered Mustang to set the alignment back within specification.
  • KONI high-performance single-adjustable struts and shocks match well with Eibach and H&R springs to provide excellent performance and ride quality.
  • Your choice of high-quality Eibach or H&R springs will lower your Mustang and improve handling.