Maserati Bi-Turbo front brakes and hubs

• 5 bolt classic biturbos
  • 284mm 22mm vented discs, 7.3kg
  • ATE floating calipers
  • Fit 15" rims
  • Same pads as on BMW 5 (Ferrodo FDB256)
  • 106mm PCD (exclusive to Maserati rims), M12 x 1.5 bolts
  • Adjustable hub bearings
• non-ABS (92-94) Ghibli and Shamal
  • Same calipers and hubs as above
  • bigger 300mm 22mm vented discs, 7.3kg
  • hub carriers modified to offset calipers by 8mm
  • designed to fit 16" rims, calipers can be machined to fit 15" rims
• ABS Ghibli (including GT)
  • 324mm thicker 30mm vented discs, about 10kg
  • Fit 16" rims
  • Same floating calipers as on BMW 8 (Ferrodo FDB856) with pads of bigger surface
  • New hubs (with two bigger BAF-0021A ball bearings), not adjustable, not servicable
  • New hub carriers to properly place calipers at 30mm discs
  • 108mm PCD (industry standart) and M12 x 1.25 bolts
  • non-ABS calipers can be fitted to these hub carriers
• QP4 (some late Ghibli ?)
  • 307mm 30mm vented and drilled discs (smaller than on ABS Ghibli), 9.5kg
  • Brembo aluminum four piston calipers (same as on 3200GT)
  • Same hubs and carriers as on ABS Ghibli
  • 17" rims required for Brembo calipers
• Alternate cheap biturbo 5 bolt solution
  • Standart hub carriers with any hub (for 106 or 108mm PCD)
  • Shamal 300mm 22mm vented discs, 7.3kg
  • BMW 525td touring calipers for vented discs + FDS779 pads (or racing pads), fit perfectly
  • 16" rims

• Any hub carrier fits any shock absorber
• Any hub fits any hub carrier
• Any caliper fits any hub carrier
• ABS Ghibli/QP4 hub bearings can be retightened and probably serviced (bearings replaced)

CAUTION: Ghibli/Shamal/QP4 front arms are longer than those on biturbo. Which means if a Ghibli hub carrier is fitted with a biturbo arm the resulting camber is POSITIVE. Lowering the suspension does not compensate enough the camber.
The whole Ghibli arm assembly is required to have the right geometry.

Aftermarket 300mm Shamal discs are hard to find.
The only I found are Tarox Sport Japan front brake discs (1111SJ) at about 350 GBP

284mm (biturbo), 300mm (non-ABS Ghibli and Shamal) and 307mm (QP4) discs

biturbo/Shamal ATE and QP4 Brembo calipers

QP4 (and ABS Ghibli), biturbo and non-ABS Ghibli (with fitted QP4 hub) hub carriers

A biturbo caliper machined to fit the 430 15" rim with a 300mm disc