SBP 1999-2007 Chevrolet Silverado GMC Sierra LARGE Aluminum Coolant Expansion Tank Black Cap

Straightboost® Performance – Massive Coolant Expansion Tank for 1999–2007 GM Trucks At Straightboost® Performance, we’re committed to engineering high-quality, innovative products for the automotive performance community. We’re proud to introduce our Massive Coolant Expansion Tank, designed specifically for 1999–2007 GM truck models, including the Chevrolet Silverado. This tank is a direct fit replacement that works seamlessly with the OEM air-box, offering a perfect blend of form and function. If you’re looking to upgrade your factory plastic tank for enhanced performance, durability, and a cleaner engine bay appearance, this is the solution for you. Key Benefits Nearly double the capacity of the OEM plastic tank — helps maintain cooler operating temperatures and improves overall efficiency. 25% lighter than the factory tank. Fully TIG-welded aluminum construction for long-lasting strength and reliability. Works with OEM air-box—no modifications required. Coolant level sight tube for quick visual checks. Billet aluminum radiator cap available in 16 PSI (standard OEM), 28 PSI, or 36 PSI for high-performance applications. Billet aluminum inlet/outlet barbs for secure connections. Specifications Brand: Straightboost® Material: Aluminum Finish: Natural Aluminum Radiator Cap: Anodized Black 16 PSI (standard) OEM Tank Capacity: 0.94 gal (3.57 L) Straightboost Tank Capacity: 1.63 gal (6.18 L) 74% increase in capacity ( 0.69 gal / 2.61 L) Dimensions: Length: 10″ (254 mm) Width: 6.0″ (115 mm) Height (tall side): 7.0″ (203 mm) Height (short side): 6.0″ (127 mm) Additional Details May fit other GM vehicles using the same style expansion tank (contact us to confirm compatibility). Custom fitting options available — AN and ORB fittings can be added or repositioned upon request. Made to order in the USA — current production time: 1–2 weeks. Note: Light surface scratches may be present due to the manufacturing process. No coolant level sensor port. For off-road or race use only.