ARP 235-3703 Head Bolt Kit for CHEVROLET Big Block Mark IV block with Late Bowtie aluminum. Iron Dart. Pro-1. Pro Top Line. & World Products iron heads ymm_48 Brass sensors accurate to within

Brass sensors accurate to within 3% of full scale (pressure sensors)

If the car is equipped with performance exhaust with electronic valve actuators than actuator set P-HF1006 is required and the Akrapovic sound kit P-HF1003 can not be used

the wing needs to be manually set to the preferred angle before driving

The exhaust valve – with its housing cast in the in-house foundry – gives the exhaust a rich sound with an emphasis on high frequencies

we have linked directly to it with the Website link

ARP 235-3703 Head Bolt Kit for CHEVROLET Big Block Mark IV block with Late Bowtie aluminum. Iron Dart. Pro-1. Pro Top Line. & World Products iron heads ymm_48 Brass sensors accurate to withinSpecifications Socket Size(s) 1 2 12pt