How many check valves am I getting for $ 4.33

You get one check valve. I thought it was 5 by the picture but when I bought it I only got the one.

what is the diameters for inlet & outlet? thanks.

Does anyone know why the diameter of those 2 ports are different from 1/4 black end?

Can they be used on a boostefd engine and if so how much boost?

Kevin, I need a little more info. What engine do you have and where are you considering mounting these check valves? Please tell me the engine size, number of cylinders, if you mean turbo boost, or other kind of boost system, and definitely if used for racing.

What are the dimensions of the ports ?

The item I purchased (not what’s in the photo) was designed for internal hose (tube) diameter of 3/16”.

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🛠️ Upgrade your ride with GM precision – don’t settle for less!

BUILT TO LAST - ACDelco manufacturing guarantees long service life and consistent durability.
SEAMLESS INSTALLATION - Compression inlet and NPT outlet connections for quick, hassle-free setup.
LIGHTWEIGHT YET DURABLE - Nylon construction balances strength with minimal added weight.
PRECISION ENGINEERED FIT - Machined finish ensures perfect form and function every time.
GM RECOMMENDED RELIABILITY - Trust the exact OEM spec for flawless HVAC system performance.

The GM Parts Genuine 15-50568 Vacuum Check Valve is a GM OE-specified replacement part designed for HVAC systems in GM vehicles. Crafted from durable nylon with a machined finish, it features compression inlet and NPT outlet connections for easy installation. Manufactured by ACDelco, this lightweight valve ensures reliable performance, durability, and a perfect fit, maintaining your vehicle’s original factory standards.

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Material	Nylon
Brand	GM
Item dimensions L x W x H	2.7 x 1.4 x 1 inches
Exterior Finish	Machined
Inlet Connection Type	Compression
Outlet Connection Type	NPT
Number of Ports	1
Outlet Connection Size	0.25 Inches
Global Trade Identification Number	00707773122037
Manufacturer	ACDelco
UPC	707773122037
Model	Check Valve
Item Weight	0.634 ounces
Product Dimensions	2.7 x 1.4 x 1 inches
Item model number	15-50568
Manufacturer Part Number	15-50568
OEM Part Number	15733271

GMParts Genuine 15-50568 Vacuum Check Valve

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