System 1

System 2

Uses the Porsche 996 Carrera 4-piston monobloc caliper over the 2000 Audi S4 321x30mm rotor. We have solutions to fit the A4, A6, 1C, 2C⁽¹⁾, 5K, UrQ, '92-'94 V8Q⁽¹⁾, VW Passat. Requires 17" wheels minimum.

NOTE: This design is DISCONTINUED for the UrS cars- the preferred designs for the urS4/S6 (and 200s or V8Qs that use their struts and brakes) are Sys 3 (which fits a lot more 16in wheels) or Sys 6, which fits a few 16s but mostly 17s.

System 2 for the neu-S4 and A6 2.7t

Uses the Porsche 996 Carrera 4-piston monobloc caliper over the factory rotors for these cars, and any cars that uses the same brakes. This design will fit under the factory neu-S4 17" wheels.

System 2 for UFO-equipped Vehicles

Uses the Porsche 996 Carrera 4-piston aluminum monobloc caliper over a Mercedes-Benz V12 320x30 rotor. Fits all UFO-equipped as delivered to the USA, and should fit under some factory 16" wheels. Completely bolt-on, no modifications to the struts required.

System 3

Uses the Porsche 996 Carrera 4-piston monobloc caliper over the European A8 314x30mm rotor. Fits the '92-97 S4/S6, 2C⁽¹⁾, '92-'94 V8⁽¹⁾. Fits under 16" wheels.

System 4 - DISCONTINUED

Used the Porsche 996 Turbo 4-piston monobloc caliper over the European S8 323x30mm rotor.

System 5

Uses the Porsche 993 Turbo (Big Red) 4-piston caliper over the Porsche 993tt/GT-3 322x32mm rotor ring using the RS2 front caliper mounting brackets. Requires custom (BIRA-supplied) rotor hat. This solution fits the '92-97 S4/S6 only.

System 6

Uses the Porsche 996 Turbo 4-piston monobloc caliper over the Porsche 993tt/GT-3 322x32mm rotor ring. Requires custom (BIRA-supplied) rotor hat. We have solutions to fit the '92-97 S4/S6; 1996-2000 A4; 2000-2002 S4 and other HP-2 equipped cars; 1997-1999 A8; A6, 1C, 2C⁽¹⁾, 5K, UrQ, V8⁽¹⁾, VW Passat. Virtually identical to the latest Movit kits at 2/3 the price.

We also offer "upgrade" brackets for Movit-design owners to replace your old 993tt-based brakes with the new Porsche 996tt monobloc caliper using your existing rotor/hat combination. Install the new Turbo calipers for the price of rebuilding your 993tt older calipers.

Replirotors

All BIRA designs, except System 6, are available with Coleman multi-piece rotors as optional equipment.

Rear Brake kits

Further, contrary to many opinions, we do not see the need for rear brake upgrades on our cars other than to look sharp and lighten your wallet (and they do both very well...) Track testing by members has shown that stock rear brakes are usually sufficient when used with a good set of better-compound pads (we prefer Kerr Friction pads from Paul Weston Motorsports) and good quality rotors. For example, most of the Speedvision Touring Cars use stock rear brakes. If they don't need them for the track, why do you?

As noted, there are significant technical challenges (which equate to additional costs) to keeping the parking brake. We've seen very clever ways that this has been handled, but none that are cost-effective. The only elegant and simple way I've seen to do rear brake upgrades involves some clever parts-bin engineering: http://www.audiworld.com/tech/wheel1.shtml

However, should you insist on rear Porsche brake upgrades, there are alternative suppliers that can accommodate you.

Note 1: These are non-UFO cars only. We are presently developing a solution for UFO-equipped cars. However, if your car has been updated to the S4 brakes (as per the old "Dealer Recall") then you can use the design for the '92-'97 S4/S6.