Snow Performance SNO-81081 30 PSI Boost Hobbs Switch

Vehicle Fitment

• Universal fit - compatible with Snow Performance water-methanol injection systems generally, not tied to a specific make or model.

Fitment Notes

• Spec conflict found in sourcing: this switch is consistently named and listed as a "30 PSI" switch, but one source describes it as activating at 35 PSI with an adjustable range of 25-50 PSI. Confirm the actual pressure range and default setpoint with Snow Performance before publishing, since this is a safety-relevant activation threshold.
• Designed as a Stage 2 replacement switch - confirm compatibility with your specific Snow Performance kit generation before ordering.

Features

• Air pressure (boost) actuated switch
• User-adjustable set point
• Automatically engages water-methanol injection based on boost pressure, and shuts off injection if boost drops below the set threshold
• Compatible with all Snow Performance water-methanol injection systems using this switch type
• Simple electrical hookup for boost-referenced activation

Specifications

• Switch actuation style: Air pressure
• Nominal rating: 30 PSI (verify adjustable range before publishing - see Fitment Notes)
• Package dimensions: 7 x 7 x 5 in.
• Weight: 1.0-2.2 lbs (packaged, varies by source)
• California Prop 65 warning applies

Included Components

• 1x Boost-activated Hobbs-style pressure switch

Product Description

The Snow Performance SNO-81081 is a boost-activated pressure switch designed to control when a water-methanol injection system engages, based on turbo or supercharger boost pressure. As a Stage 2 replacement switch, it's intended for owners replacing or upgrading the pressure switch on an existing Snow Performance kit rather than as a first-time installation on a specific vehicle - it's a universal-fit component that works across whatever platform the rest of the injection system is installed on.

Functionally, the switch acts as both an activation trigger and a safety cutoff: it engages the water-methanol injection once boost pressure crosses the set threshold, and automatically shuts the system off if boost drops back below that point. That behavior matters most on setups where injection is meant to run only under load, rather than continuously - it keeps the system from wasting water-meth mixture (or, more importantly, from failing to inject when boost is actually present).

Given the pressure-threshold discrepancy in available sourcing, I'd treat the exact PSI rating and adjustable range as unconfirmed until checked against Snow Performance's own documentation - this is a part where the number genuinely matters for whether the injection system does its job at the right moment.