Right , i went to fit an external oil cooler last week to the cup, everythings is on except when i went to fit the bolt into the block that the sandwich plate fits on it was 1m to big when measured on calipers, i tried all combinations as i had the original bolt{reno} and the mini extention bolt...but to no avail, i then thought o.k. ill see what devolps, i then kindly obtained another male to male bolt from luke and guess what , thats too big too?..., i also contacted think automotive and asked them, they then sent me another male to male bolt , of which still doesnt fit..im begining to think it should be a M19 not a M20 which is what i have and still doesnt fit..., i have fitted one on nicole and im sure i justed used a male -female brass bolt that went into the block , the sanwich plate went on and the oil filter went on after.....grrrr , how blimmin hard can it be?, i even started thinking maybe the block had been tap and dyed but i have tried the bolts on two other blocks, please can anyone unscramble my head...cheers , matty..