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The Halo series gauges have a deeper face than other Prosport gauges
It is fully compatible with DOT 3 and DOT 4 fluids
Replacing your springs and retainers with upgraded parts
6mm in diameter (40% stiffer than the stock 19mm)
TurboXS Racing Bypass Valve 1G DSM CZ4A The Halo series gauges haveThe TurboXS Racing Bypass Valve is fabricated from billet aluminum, with a solid brass piston. It's adjustable to handle boost from as low as 10psi all the way up to 35psi. It features a return pipe outlet so you can plumb it back to your intake system, just like your factory CBV. The valve is fully rebuildable. Kit includes CBV, pre load adjustment washers, mounting hardware for your car, allen wrench, and installation instructions. Fits all 1990
