Does the connectors that come with this product except single or double flare?

I installed this product on a 1968 Pontiac GTO using a double flair. However, you can still use a single flare if thats all you have. Double flares are better becuase it leaves more tubing material at the end for the fittings to clamp when tightened together. A single flare will work fine as long as its a perfect flare. From experience with double flares they dont need to be perfect in order for them not to leak. For example with a double flare; you might have one end .001"-.003'' shorter than the other like a lopsided pyramid and it will probably still seal just fine. But when you do that on a single flare, theres a good chance your fitting will crack or split the end of the single flare thats under the most stress. Like if you do a lopside pyramid on a single flare, its probably gonna leak beacuse it either cracked in the fitting or theres just not enough filler metal to create a tight seal between the fittings. Hope this helps when working on tubing...

My fittings are metric 10mm, what will I need to make this work?this is s.a.e right?

These have a 1/8-27 NPT but include adapters to go to 3/16-24 Female. You will need an adapter to go from 1/8-27 NPT to 10mm female or an adapter to go from 3/16-24 male to 10mm female.

What is the flow coefficient of the vale? (The Cv value. It's unbelievable this is not in the description.)

Not sure what that means but I believe it reduces flow up to 50% used it on a jeep tj with axle swaps and have had zero issues

is 8419 disc on disc ?

You would have to elaborate more

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Wilwood 260-8419 Adjustable Proportioning Valve Knob,Silver

Product ID: 11182178

Details

Brand
Wilwood
Exterior Finish
Painted
Inlet Connection Size
0.38 Inches
Inlet Connection Type
National Pipe
Item dimensions L x W x H
5.91 x 7.87 x
Material
Metal

⚖️Lightweight 5.2 oz valve

⚙️100-1000 PSI adjustable pressure

🛠️Compact forged billet design

398.64 DT

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Tune your brake game with pro-level precision!

DURABLE COMPACT - Forged billet metal construction ensures strength and longevity in a sleek, space-saving design.
MAXIMUM PRESSURE RANGE - Handles 100 to 1000 PSI, offering up to 57% rear brake pressure reduction—the highest in its class.
ULTRA LIGHTWEIGHT BUILD - At just 5.2 ounces, it adds minimal weight while delivering maximum performance.
UNIVERSAL COMPATIBILITY - Includes 1/8-27 NPT to 3/8-24 inverted flare fittings, fitting most domestic 3/16” brake lines seamlessly.
PRECISION PRESSURE CONTROL - Fine-thread adjuster knob lets you dial in braking balance with surgical accuracy.

The Wilwood 260-8419 Adjustable Proportioning Valve Knob offers professional-grade brake line pressure tuning from 100 to 1000 PSI with up to 57% pressure reduction. Its compact forged billet design weighs only 5.2 ounces and includes versatile fittings for easy installation on most domestic brake lines, making it the top choice for precise braking balance adjustments.

Specifications

ASIN	B002G37IEA
Best Sellers Rank	#33,382 in Automotive ( See Top 100 in Automotive ) #3 in Automotive Replacement Brake Proportioning Valves
Brand Name	Wilwood
Connector Type	Threaded
Customer Reviews	4.6 4.6 out of 5 stars (354)
Exterior Finish	Painted
Global Trade Identification Number	00889545067934
Included Components	Proportioning Valve
Inlet Connection Size	0.38 Inches
Inlet Connection Type	National Pipe Tapered
Item Dimensions	5.91 x 7.87 x 3.94 inches
Item Type Name	Proportioning Valve
Item Weight	0.46 Pounds
Manufacturer	Wilwood
Manufacturer Part Number	2608419
Manufacturer Warranty Description	1 year
Material Type	Metal
Maximum Pressure	1000 Pound per Square Inch
Model Number	260-8419
Number of Pieces	1
Number of Ports	2
Outlet Connection Size	0.38 Inches
Outlet Connection Type	NPT
Part Interchange Info	260-8419
Size	Stock
Smart Home Compatibility	Not Smart Home Compatible
Thread Size	Fine
Thread Type	Fine
UPC	889545067934
Unit Count	1.0 Count
Valve Type	Proportioning Valve

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