The Texas Speed Billet Overflow Reservoir is a billet aluminum coolant overflow tank built on the same reservoir body and bracket system Texas Speed uses for its catch cans, so it installs the same way and gives a clean, uniform look in the engine bay. An integrated fill cap sits on top for easy access, and the billet construction is intended for strength and long service.
Texas Speed notes the reservoir can also serve as an auxiliary fluid tank to increase capacity in a transmission system when extra volume is needed for high-performance or demanding use. Two fittings are included to adapt the tank to common radiator hose sizes: one -6AN ORB to 3/8" (9.5 mm) barb and one -6AN ORB to 5/16" (8 mm) barb. Texas Speed lists no vehicle fitment, so it is a universal part for custom installation.
Specifications
- Type: Coolant overflow reservoir or auxiliary fluid reservoir
- Construction: Billet
- Fill cap: Integrated
- Mounting: Same reservoir and bracket system as Texas Speed catch cans
- Fittings included: One -6AN ORB to 3/8" (9.5 mm) barb, one -6AN ORB to 5/16" (8 mm) barb
- Also usable for: Increasing transmission or cooling system fluid capacity
- Fitment: Universal
- Part number: TSP-OVRFLW-RSVR
Kit Includes
- Billet overflow reservoir with integrated fill cap and bracket
- -6AN ORB to 3/8" (9.5 mm) barb fitting, qty 1
- -6AN ORB to 5/16" (8 mm) barb fitting, qty 1
Note: Designed to adapt to various radiator hose sizes using the included AN fittings.
FAQ
What fittings come with the Texas Speed Billet Overflow Reservoir?
Two fittings are included: one -6AN ORB to 3/8" (9.5 mm) barb and one -6AN ORB to 5/16" (8 mm) barb, which let the reservoir connect to common radiator overflow hose sizes.
Is the overflow reservoir vehicle specific?
No. Texas Speed lists no vehicle fitment for it. It is a universal billet reservoir meant for custom installation using the included bracket and AN barb fittings.
Can the reservoir be used for something other than coolant?
Yes. Texas Speed states it can be used as an auxiliary fluid reservoir to increase capacity in a transmission system when more volume is needed for high-performance or demanding applications.
Does it mount like the Texas Speed catch can?
Yes. Texas Speed builds the overflow reservoir on the same reservoir body and bracket system as its catch cans, so mounting and appearance match a TSP catch can installed alongside it.

