99-07 GM Truck Combo Tank | Engine Coolant Expansion & Air Oil Separator Black

Straightboost Large Coolant Expansion & Oil Catch Can Combo Tank

Fits 1999–2007 GM Truck Applications

 This all-aluminum tank is designed to work seamlessly with OEM or aftermarket air-boxes while retaining OEM coolant hose routing, making it an ideal upgrade without unnecessary modifications.

Mounts using all factory mounting points on the fender and firewall. No drilling or modifications are required.

If you’re looking to replace the factory plastic tank for improved durability, heat resistance, and a cleaner under-hood appearance, this is the solution.

This tank may also fit other GM vehicles that use the same style factory plastic expansion tank as the 1999–2007 Chevrolet Silverado. If you are unsure about fitment, please contact us prior to purchasing.

Customization Options:
Fittings can be changed or relocated to suit your build. AN and ORB fitting options are available. Contact us for custom configurations before ordering.

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Specifications

• Brand: Straightboost®

• Material: Aluminum

• Finish: Natural Aluminum

• Construction: Fully TIG-welded

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Features

• Designed to work with OEM or aftermarket air-boxes and OEM coolant hoses

• Coolant level sight tube for quick visual inspection

• Billet aluminum radiator cap options: 16 PSI (OEM), 28 PSI, or 36 PSI

• Billet aluminum coolant inlet and outlet barb ports

• (2) -10AN breather ports

• Straightboost® multi-level internal baffle design for effective oil separation

• Breather filter screen

• Laser-cut aluminum retaining plate (Anodized Black)

• 6AN ORB drain port with billet aluminum drain valve, featuring a 1/8″ NPT internal thread to aid oil drainage

• Integrated dipstick for checking oil catch can level

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Capacity

• OEM Tank Capacity (filled to top): 0.94 gal / 3.57 L

• Straightboost Tank Capacity (filled to top): 1.0gal / 3.9 L

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Dimensions (See Reference Photo)

• Length: 18″ (457 mm)

• Width: 5″ (127 mm)

• Rear Height (not including mounting bracket): 7.25″ (184 mm)

• Front Height: 6.0″ (152 mm)

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Proudly Made in the USA

Light surface scratches may be present due to the manufacturing process.

These tanks are made to order. Current lead time is 10–15 business days.

For special requests or custom configurations, please message us prior to purchase.

Note:

• Does not include a coolant level sensor port.

• Fender to Firewall support brace will need to be removed in order to install this tank.