JEGS Aluminum Master Cylinder with Dual Reservoir

Master Blaster

JEGS offers a wide variety of brake master cylinders, power boosters, mounting brackets, and hardware for direct fit or universal applications. Whether you’re looking for a chrome unit to make your engine bay shine or just a replacement to get your vehicle back on the road, they have you covered. All units are manufactured using high-quality materials and finishes to provide years of braking service.

jegs performance brake reservoir

JEGS 631235 dual reservoir universal master cylinder machined from ultra-lightweight cast aircraft-quality aluminum with a natural finish. This unit features a chrome cap, 1-inch bore, GM universal mounting, and two 3/8-inch-24 inverted flare ports on each side. Also included are two plugs for ports not being used and a piston adapter that will allow you to install this on vehicles with power or manual Disc/Drum or Drum/Drum applications. The perfect upgrade for the GM vehicles they have listed on their website.


JEGS High Performance logo


JEGS High Performance






(800) 345-4545


751 E 11th Ave.

Columbus, OH 43211

ABOUT JEGS High Performance®

JEGS High Performance sells performance auto parts, aftermarket accessories, tools, and race apparel. JEGS was founded by Jeg Coughlin Sr. in 1960 as a small speed shop. JEGS is still family owned and operated, but has expanded to include a massive 250,000-square-foot warehouse, approximately 350 employees, two mail-order facilites, a retail store and a race team (Team JEGS). Team JEGS is currently one the most successful teams in U.S. drag racing, with more than 100 victories at the national, divisional and local levels. And JEGS Foundation Racing for Cancer Research program has raised several million dollars.