Prisoners tested Suzuki Hayabusa 1300

Prisoners high tensile guaranteed at least 550hp on engine Lancia Delta

Reinforced head studs Lancia Delta Fiat COUPE 2000 16V Turbo high traction that ensure a correct closing of the head tested up to 530 hp on Lancia Delta engine with usual thread and diameter of series. No need to rethread the block.

12 mm increased and reinforced high traction head studs pitch 1.25 for Fiat Uno Turbo engines - Punto Gt 1400-1600

Prisoners high traction for Ford Sierra / Escort Cosworth 12mm

High traction reinforced head studs for Fiat 500 Abarth engines Fiat Fire or Fiat T-Jet Abarth, Panda 100hp engines and all Fiat fire 8v engines and similar engines.

High traction studs that ensure a correct closure of the cylinder head on the engine with the usual thread and stock diameter.

Prisoners high tensile