Your S550 wants a divorce, from its milk jug of a coolant bottle: SPE S550 Mustang Billet Degas Bottle.

Let's be honest, the factory S550 coolant tank looks like something you'd store questionable leftovers in, and it has the structural integrity of a wet paper towel under pressure. Tired of wondering if today is the day it finally gives up the ghost? Or just tired of looking at that hideous OEM installed milk jug of a coolant bottle?

Enter the SPE Billet Degas Bottle. Machined from glorious, indestructible billet aluminum, It bolts right in, holds coolant like it's supposed to (imagine that!), and won't succumb to the pressure like its pathetic plastic predecessor. It's stronger than your excuses for buying more car parts, and it looks infinitely better than that cloudy plastic eyesore Ford decided to use.

Check It Out!: https://www.spemotorsport.com/collections/mustang-cooling-system/products/spe-billet-s550-mustang-coolant-degas-bottle

Features and Benefits:
 
•  Hard Anodized Black 

•  Made from 6061 billet aluminum

•  Retains all factory hoses

•  Retains all factory mounting positions

•  High pressure vent cap which allows for proper venting in high performance situations

•  Push lock vent fitting