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 - Crafted with a machined exterior finish ensuring long-lasting durability under pressure.
EASY INSTALLATION - Compression inlet and NPT outlet connections designed for quick, hassle-free replacement.
LIGHTWEIGHT COMPACT - At just 0.634 oz and 2.7 x 1.4 x 1 inches, it fits discreetly without adding bulk.
TRUSTED GM RECOMMENDED PART - Backed by GM’s rigorous quality standards for reliable HVAC system performance.
SEAMLESS GM OE COMPATIBILITY - Engineered to match original GM factory specs for flawless fit and function.

The GM Genuine Parts 15-50568 Vacuum Check Valve is a GM-recommended replacement part engineered to meet original equipment specifications. Featuring a durable machined finish and compact design, it ensures reliable HVAC system performance and easy installation, delivering the trusted quality and longevity expected from GM.

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Brand	GM GENUINE PARTS
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

GM Genuine Parts 15-50568 (15733271) Vacuum Check Valve

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