Originally Posted by
bigad4x4
Its quite true infact arps have been
known to crack blocks FACT, i was put off using them for my new engine by Karl at NMS, so sold them at a loss
Andy Fisher and Karl rate the standard headbolts so thats quite alright with me
if fitted incorrectly and without care and attention IMO
i ran a strong stage 3 350-370hp saff and had no problems with the stud and nut kit at all
but having said that i agree standard head bolts are perfectly happy at this level