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Correct

Finally, replaced double stage vacuum brakes and 5 gen legacy front brake calipers(316mm) . Satisfied with this brakes performance.

Non abs in my subaru,so single stage booster . Single and two stage booter ,look like different. If installed two stage ,should be modified brake line?

Hello mate, Recently, feeling brake weak. Replaced the pads and caliper upgrade to pot 4, but still not got strong brake. I heard may try to upgrade brake vacuum booster. So what type booter I can replace ot.