You'll need the master cylinder aswell, mk2 and onwards boosters pushrods don't fit on mk1 masters. Look for an mk2.5 (not mk2, but mk2.5) non ABS car master + booster.

You can try an mk2.5 ABS master+booster. But, the ABS master has 2 outlets, instead of 3. And the servos attached to the ABS masters boost more, so it's likely you'll lock your brakes quite easily.

And yes, absolutely worth the swap.

 

Ok cheers much appreciated. What do you do with the 3rd outlet then?

 

You can cover it. But I'd rather go with a non ABS master+booster.

 

Did Mazda ever produce any Mk2.5 models without ABS?

Mk1 non-abs master has 3 ports ...

 

Above ABS question, yep, they did.

As for the ports question, yes, you're right, I told the number of ports the other way. ABS master cylinder has 2 ports and non-ABS has 3, the third one going to the driver's side front brake.

I'll edit the post for future reference :thumbs-up:

 

I took a look to the service manual. In the Brakes section, regarding the "power brake unit", manual states that, in UK, the fatter booster was equipped on standard diff cars, and the LSD cars had a lighter booster. So no ABS related. Things get complicated.

Well, Mazda equipment options is a joke. Almost every country has its own

I've attached a pic:

As it's in spanish, I translate for you the main items:

"Nuevo MX-5" (NB): mk2.5
"Actual MX-5" (NB): mk2

"Cilindro de Mando": Master Cylinder; you can see mk2.5 one with is 1/16" bigger, I have pics of this too:

mk2 one:

mk2.5 one:

"Servofreno": Booster

"Dispositivo de control de la fuerza de frenado": Brake Prop Valve (or an electronic device on ABS cars)

"Especificaciones para Reino Unido": UK market specs
"diferencial estándar": open diff
"LSD": torsen or tochigi-fuji diff

"suspensiones deportivas y rígidas": yellow bilsteins equipped cars
"suspensiones estándar": standard shocks cars

So, to summarize, if you want to upgrade the hydraulics too, you'll have to look for an LSD mk2.5 MC+booster, or so I think, unless Mazda marketing department has more surprises to give regarding MX5 equipment options across the countries