Sinister Diesel Upper Radiator Pipe Kit for 2001–2005 GM 6.6L Duramax LB7/LLY
Refresh your Duramax cooling-system plumbing with a mandrel-bent 6061 aluminum upper radiator pipe and Signature Sinister Blue styling. This Sinister Diesel kit pairs the aluminum pipe with two four-ply silicone boots and four stainless steel hose clamps for a coordinated replacement assembly.
Whether you’re replacing worn upper radiator plumbing or finishing an under-hood project, the blue powder-coated pipe adds a distinctive look alongside the Sinister Diesel-branded boots.
Key features
- 6061 aluminum alloy pipe: Described by Sinister Diesel as abrasion- and crack-resistant.
- Precision mandrel bends: Designed to match the factory routing on compatible applications.
- Four-ply silicone boots: Heat-resistant construction with Sinister Diesel branding.
- Manufacturer-listed 400 psi boot rating: Applies to the silicone boots, not the complete cooling system or its recommended operating pressure.
- Sinister Blue finish: Polished and powder-coated aluminum pipe.
What’s included
- 1 aluminum upper radiator pipe
- 2 silicone boots
- 4 stainless steel hose clamps
Fitment
Listed application: 2001–2005 Chevy/GMC 2500 and 3500 with the 6.6L Duramax LB7 or LLY diesel engine.
Confirm your model year, engine designation and cooling-system configuration before ordering. Contact us to verify compatibility with any existing modifications.
Part number: SD-RADTUBE-DMAX-01