Blow Off Valve 50 mm Piston-type for silicon hose

Nuke Performance Blow Off Valve 50 mm Hose Connection is an atmospheric piston valve type with the highest flow capacity available.
When it is necessary to be able to rely on the installation and function. The Nuke Performance Blow Off Valves are available with either a 50mm hose connection or a 3" V-Band connection. For serious boost, and serious power.

Lightweight Blow Off Valve
50mm / 2" hose connection or V-Band connection
0.35 - 0.50 BAR setup spring is preinstalled
50mm piston valve design
1/4" reference vacuum port
Made in Sweden

It's ready for some serious boost, and some serious power. Either installed in a single setup or in a dual setup when one isn´t enough. It´s designed with an oversized 50 mm valve, we believe this is the largest valve available with the highest flow capacity for an atmospheric blow-off valve.

Easy to connect to your intake with either the 50mm (2") hose connection or with V-Band, available with both options.
The Nuke Performance Blow Off Valves are available with either a V-band connection, where both the needed lightweight aluminum clamp and the aluminum weldable flange are included. If you prefer, the hose connection version suits a common 2" (50mm) silicon hose, easy to install without the need for welding and custom manufacturing.

Choose the right setup spring for your engine setup
The Nuke Performance Blow Off Valve 50 mm V-Band comes with a setup spring preinstalled, the 0.35-0.50 BAR spring is the most common and popular spring and is used by most of our customers.

0.50 - 0.75 bar (7.25 - 10.9 PSI) : Additional BLACK SPRING (Part #: 900-01-104)
0.35 - 0.50 bar (5.07 - 7.25 PSI) : Premounted BLUE SPRING (Part #: 900-01-103)
0.00 - 0.35 bar (0.00 - 5.07 PSI) : Additional WHITE SPRING (Part #: 900-01-102)

To find out which spring suits your build the best, you measure the engine vacuum at idle and with the engine at operating temperature. It is easy to swap the setup spring when needed, you only need a 5mm hex key.

Delivered with a 6mm (1/4") pneufit quick connect fitting.
On top of the blow off valve, it's delivered with an over-dimensioned 1/4" pneufit quick connect fitting for a 6mm hard tube. Used to connect the blow off valve to the inlet manifold vacuum. Additional tube and barb fittings are available as accessories.
1/4 BSPP Barb fitting to 4mm hose Part #: 300-10-113
1/4 BSPP Barb fitting to 6mm hose Part #: 300-10-111
1/4 BSPP Barb fitting to 8mm hose Part #: 300-10-110
6mm Push in vacuum tubing - 2m (6ft) Part #: 600-10-101

How does the Nuke Performance Blow Off Valve sound in action?
We believe that the Nuke Performance atmospheric 50mm blow off valve is one of the best-sounding blow off valves in the world, so we asked our friend and driver Mårten Stångberg to record it in action installed in his drift-spec 860whp, 975wnm, Mercedes CLK M104 Turbo.

What is the purpose of a blow-off valve, and how does it work?
A blow off valve is actually a Pressure release valve that releases turbo pressure / boost when the throttle plate is closed. While the turbo is still spinning and creating pressure, a wave of pressure will travel back to the turbocharger when the throttle closes, this will result in the compressor wheel stalling the “compressor surge” and slowing it down very quickly.

A blow off valve mounts in between the turbo and the throttle and is connected to the vacuum
A well-dimensioned blow off valve increases the turbo´s lifespan and is necessary for its functionality

This is hard on the bearings and decreases the turbo´s lifespan, it will also take a longer time for the turbo compressor to spin up the next time the throttle opens and the turbo will not be able to deliver maximal boost as quickly as possible. For more information about our blow off valves, view our FAQ about "how does a blow off valve work?".

Developed upon high demands from worldwide motorsports.
Designed and manufactured in Sweden, to handle extreme amounts of power with the same hallmark as all of our performance products. The body and all internal components are CNC-machined from 6082 aluminum alloy, anodized for a long lasting, corrosion-free appearance. Always ready to give you maximum function and with extremely high quality, the valve performs even in extreme and demanding conditions.

There is no substitute for the quality of Nuke Performance.

Blow Off Valve 50 mm Hose Connection Specifications:
For more information about specifications, contact us directly.

Connection Hose connection for 50mm (2") hose
Internal design 50 mm piston valve design
Vacuum port thread 1/4" BSPP
Vacuum port fitting 1/4" BSPP to 6 mm (1/4") push-in tube fitting
Pre-set spring installed 0.35 - 0.50 BAR (5.07 - 7.25 PSI)
Height 81 mm (3.18")
Width / Diameter 89 mm (3.50")
Height 98 mm (3.85")
Weight 399 g (17.07 oz)
For motorsports use YES

Spring pressure chart, setup springs for your blow off valve
Measure the engine vacuum at idle and with the engine at operating temperature.

0.00 - 0.35 BAR (0.00 - 5.07 PSI) Additional WHITE spring (Part #: 900-01-102)
0.35 - 0.50 BAR (5.07 - 7.25 PSI) * Premounted BLUE spring (Part #: 900-01-103)
0.50 - 0.75 BAR (7.25 - 10.9 PSI) Additional BLACK spring (Part #: 900-01-104)
* preinstalled at delivery

Nuke Performance Blow Off Valve 50 mm Hose Connection Includes:
1 x Blow off valve 50 mm for hose connection
1 x Pneufit 1/4 BSPP to 6mm (1/4") hard tube push in

Download Product Sheet (.pdf)
Accessories / Spare Parts
FAQ : How does a Blow Off Valve work?