Coolant Expansion / Oil Catch Can Combo Tank

1999–2007 GM Truck & SUV Models

We are proud to introduce our all-in-one Coolant Expansion and Oil Catch Can Combo Tank, engineered specifically for 1999–2007 GM truck & SUV platforms. Designed for seamless integration, this unit is fully compatible with both OEM and aftermarket air boxes, as well as factory coolant hoses.

Whether you're upgrading from the factory plastic tank for improved durability, performance, or a cleaner engine bay appearance, this system delivers a significant improvement in both form and function.

This tank may also be compatible with other GM vehicles utilizing the same style expansion tank found in the 1999–2007 Chevrolet Silverado. If you're unsure about fitment, feel free to contact us before purchasing.

Custom configurations are available, including alternative fitting sizes and placement options. AN and ORB fittings are supported—please reach out for details.

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Specifications

• Brand: Straightboost Performance
• Material: Aluminum
• Finish: Natural Aluminum
• Construction: Fully TIG welded

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Features

• Designed to work with OEM or aftermarket air boxes and factory coolant hoses
• Integrated coolant level sight tube
• Billet aluminum radiator cap options: 16 PSI, 28 PSI, or 36 PSI
  (Default: 16 PSI unless otherwise specified at checkout)
• Billet aluminum inlet/outlet barb fittings
• Dual -10AN breather ports
• Proprietary multi-level internal baffle system
• Integrated breather filter screen
• Laser-cut aluminum retaining plate
• 6AN ORB drain port with billet aluminum drain valve
  (Includes 1/8" NPT internal thread for easy draining)
• Integrated dipstick for monitoring catch can fluid level

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Capacity

• OEM Tank: 0.94 gallons (3.57 liters)
• Straightboost Tank: 0.96 gallons (3.63 liters)

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Dimensions (See product photos)

• Length: 10" (254 mm)
• Width: 6.0" (152 mm)
• Height (tall side): 7.0" (178 mm)
• Height (short side): 6.0" (152 mm)

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Additional Information

• Proudly made in the USA
• Light surface marks may be present due to the manufacturing process
• Made to order — extended lead times may apply
• Please refer to the estimated delivery date at checkout
• For custom requests, contact us prior to purchase
• Note: This tank does not include a coolant level sensor port