ajw45

For those that might not hit the GT4 forum too often:

https://rennlist.com/forums/gt4/1118...-25-liter.html

Presumably this should be doable on any 981 or 991.1!

PorscheAddict

480 WHP is bananas in a n/a Cayman, but it sounds like you need the 3.8 core to create the 4.25L monster. 3.8L core plus Deman costs would be $50k++ easy, tough pill to swallow for our cars that are now only worth around that give or take $20k.

ajw45

Ah, sorry, oops. I thought all the 981s had the same basic block and tranny so if they are going to bore and stroke the block anyway it wouldn't matter if you started with a 3.4 or a 3.8.....