The APR Mechanical Boost Gauge System comes complete with a mechanical gauge in red or blue, with a vent mounted pod for a clean install. Included with the system is all necessary hardware to install, including a harness that eliminates the need to splice into your factory wiring harness.

Features:

52mm mechanical gauge

Vent mounted pod

LED backlight

Blue needle

30In.Hg to 40 PSI

Wiring harness

Boost hose with buzz-reducing snubber pill

All necessary install hardware

Fits Left Hand Drive vehicles only

Fits MK7/MK7.5 Golf, GTI, Golf R platform vehicles

Rebates

Holley October Promo 10% Off Select Parts Sale

Holley's October Promo 10% Off Select Parts Sale, running from September 28, 2026, through November 1, 2026. For a limited time, customers can save up to 10% off on select Holley parts, making it the perfect opportunity to upgrade your ride with premium Holley branded parts including Holley, Brawler, Quick Fuel, Leg Wheels, Rev Wheels, Rocket Racing, Flowtech, Edge, Racequip, Apr and Dinan. Purchases must be made between September 28, 2026, through November 1, 2026. This limited-time offer applies to qualifying Holley branded parts purchased during the promotional period. Following the promotion, these parts will revert back to standard pricing.

Guides & Documents

Boost Gauges Installation Instructions (425MS100148)

CA Prop 65

APR MS100148 Specifications

KEY SPECS
MFG. Part #	MS100148
Brand	APR
Gauge Type	Boost Pressure
Gauge Style	Analog
Gauge Range	30 in. Hg/40 psi
Gauge Face Color	Black
Lighted	Yes
Sending Unit Included	No
Pointer Color	Blue
Gauge Diameter	2-1/16"
Gauge Number Color	White
Shape	Round

GENERAL
Liquid Filled	No
Sold in Quantity	Kit
Notes	Boost gauge comes with a vent mounted pod and a factory wiring harness adapter.
Sending Unit	Mechanical
Gauge Sweep	Full Sweep
Memory Storage	No
Playback	No
Bezel Color	Black

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