what is the capacity of this reservoir bottle?

Assuming to the listed exterior dimensions are correct (7.5x8.25x4.25 inches), the volume is roughly 260 cubic inches. A gallon is 230 cubic inches, so subtracting a few pennies for container thickness and rounded corners, it should still hold near 1 gallon.

What is the distance between the two screw holes at the top?

Mine appears to be 4 inches center to center, but I can see there can be some manufacturing variations (+/- 1/8"). As another reviewer pointed out, the holes are offset towards the outside of the tabs by about 3/16" from the center of each tab.

Does it come with a cap? Photo does not show one.

Mine did in fact come with a vented cap.

What size hose (ID - Inside Diameter) do you use for the fitting at the bottom?

I used the same hose that was in the Lexus since it was in good condition, I don't know the diameter. I just cut of about 1/2" off to make sure of a good fit and contact.

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🚗 Keep your engine cool, your ride smooth, and your confidence unstoppable!

BUILT TO ENDURE - Durable, heat- and vibration-resistant construction keeps your engine cool under pressure.
VENTED CAP DESIGN - Ensures optimal pressure regulation for reliable coolant performance every drive.
TRUSTED BY EXPERTS - Backed by a century of automotive aftermarket excellence and millions of professional users.
LIGHTWEIGHT COMPACT - Weighs just 0.6 lbs with a sleek profile that fits front or rear positions effortlessly.
SEAMLESS UNIVERSAL FIT - Engineered for hassle-free installation in tight spaces with versatile 3-hole mounting.

The Dorman 603-001 Coolant Reservoir Bottle is a universal-fit, heat-resistant coolant tank designed for automotive and marine applications. Crafted from durable plastic with thick walls and a vented cap, it offers flexible 3-hole mounting for tight spaces. Trusted by professionals for over 100 years, this lightweight reservoir ensures reliable coolant management and long-lasting performance.

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Moroccostore

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Item weight	0.6 Pounds
Fuel type	Petrol
Product grade	like new
Fit type	Vehicle Specific
OEM part number	0
Global Trade Identification Number	00019495081272
UPC	019495081272
Automotive Fit Type	Vehicle Specific Fit
Manufacturer	Dorman Products
Model	Dorman 603-001: Universal Reservoir
Product Dimensions	19.05 x 10.8 x 20.96 cm; 272.16 g
Item model number	603-001
Manufacturer part number	603-001
Position	Front, Rear
Item Weight	272 g

Dorman603-001 Coolant Reservoir Bottle, White Universal Fit

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