This new Coolant Reservoir (Degas) Cap functions like a factory cap, but features custom Sinister Diesel looks. The cap fits OEM or Sinister Diesel Coolant Reservoir for the 2001-2016 GM Duramax. It is made from CNC machined, solid billet T6-6061 aluminum with an interior pressure relief system, so it will continue to function even in case of a gasket failure. Available in gray or Sinister Blue, this cap looks as good as it works!
Available in Anodized Sinister Blue or Gray
CNC Machined from T6-6061 Billet Aluminum
Etched Sinister Diesel Logo
Replacement for failure-prone factory cap
Fits 2001-2016 GM Duramax Coolant Reservoirs
Lifetime Sinister Diesel Warranty
(1) Sinister Diesel Coolant Reservoir Cap