for a roller with .496 lift (using 1.55 ratio rockers) and turbo . for a 206 flat they ould be ok but i wouldnt go to them for a roller
thats a 105lb seated pressure spring at 1.70 with a 1.15 bind good for .490 lift , if you shim them down to get higher seat pressure they will go to bind
summit has them in set of 12 but you need more seat press