The Nismo radiator cap is a heavy duty radiator cap, which operates at 18.2 lbs (1.3 kg/cm) compared to 12.6 lbs (0.9 kg/cm) non-turbo and 16.8 lbs. (1.2 kg/cm) turbo Nissan OE(Original Equipment) stock caps.

Blitz Racing Radiator Cap - Type 1 Blue £17.19	Blitz Racing Radiator Cap - Type 2 Red £17.19
Blitz Racing Radiator Cap D1 Spec - Type 1 £17.19	Blitz Racing Radiator Cap D1 Spec - Type 2 £17.19