Wilwood Brake Bias Valve 260-12627
M10 x 1 bubble flare, up to 57% rear-line reduction
Requirements
Overview
Big brakes, a big-bore master, or a light rear end will move front-to-rear bias off where you want it. This is Wilwood’s knob-style adjustable proportioning valve, part 260-12627. It is not an HFM-engineered part. HFM.Parts stocks it.
It is meant to cut rear brake line pressure so you can tune front-to-rear balance. Wilwood publishes the window as 150-1200 PSI, with a maximum decrease of 57%. Fine-thread knob, compact forged billet body, clear anodise.
Ports are M10 x 1 bubble flare on both inlet and outlet. Tubing with bubble-flare 10 mm x 1 nuts go on without tube-nut adapters. That thread is common on Nissan Skyline, Silvia, 180SX, and 300ZX brake plumbing. Use matching bubble-flare nuts. Plumbing mods may be required.
Suits
Suits: Nissan Skyline R32, R33, R34, Silvia S13, S14, S15, 180SX, 300ZX Z32, and any other car already running M10 x 1 bubble-flare rear-line fittings. Wilwood does not publish a chassis list for this SKU. Treat it as a universal line valve, not a drop-in OEM replacement.
Specs
- Brand / part: Wilwood 260-12627
- UPC: 889545067040
- Function: adjustable rear-line proportioning / brake bias valve
- Adjustment: knob, fine thread. 150-1200 PSI. Max reduction 57%
- Ports: M10 x 1 bubble flare (BF / BBF) inlet and outlet
- Weight: 5.2 oz
- Mounting: two side holes, 1.00 in spacing (Wilwood copy: 0.25 in; drawing labels 0.26 in / 6.6 mm)
- Material / finish: aluminium / steel, clear anodise
- From the Wilwood drawing: overall height 4.28 in (108.7 mm); body width 1.61 in (40.9 mm)
What’s included
1× Wilwood 260-12627 knob-style proportioning valve, as sold. Wilwood does not list adapters or extra fittings on this SKU. Bubble-flare 10 mm x 1 nuts go on without tube-nut adapters.
Requirement
Plumb it to reduce rear line pressure. Inlet and outlet are M10 x 1 bubble-flare seats. Use the two side mounting holes. Wilwood’s 260-12627 page does not publish a full install procedure for this part number.
Customer Installs
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Our compatibility list is based on OEM specifications. Variations may exist due to vehicle sub-models or other factors — verify fitment before purchasing.
No. It is Wilwood 260-12627. HFM.Parts stocks it.
No. 260-10922 is 3/8-24 inverted flare. 260-12627 is M10 x 1 bubble flare. Wilwood does not list this as a replacement for 260-10922.
Suits: Nissan Skyline R32, R33, R34, Silvia S13, S14, S15, 180SX, 300ZX Z32, and any other car with M10 x 1 bubble-flare rear-line nuts. Wilwood does not publish a chassis list. Plumbing mods may be required.
Only if it is a bubble-flare 10 mm x 1 nut. Wilwood specifies bubble-flare seats on this SKU. Do not assume a different flare type will seal.
No. Wilwood lists it as a proportioning valve. No residual values are published for this SKU.
Rear brake line pressure. Wilwood publishes 150-1200 PSI, with a maximum decrease of 57%, so you can tune front-to-rear balance.
Not for tubing that already has bubble-flare 10 mm x 1 nuts. Wilwood does not list adapters in the box for this SKU.
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Modifying vehicles is a specialist task and requires the knowledge and experience of competent
individuals to
be conducted safely.
We recommend this product be installed by a competent person. Instructions are given with every
order
where
available, however, If you would like a copy prior to ordering, you're welcome to contact us
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