Great looks and solid construction, what else would you expect from Sinister?

Brakes are easy to overlook in diesel performance until yours aren't working properly. OEM plastic factory brake master cylinder caps are prone to growing brittle and cracking over time. This can lead to losing fluid or allowing moisture in the air to absorb into brake fluid, which can cause brake fade or corrosion in brake lines. The Sinister Diesel Master Cylinder Cap is constructed from solid billet aluminum for years of service and keeping you safe