need to know your planned boost and power target, and the general use for the vehicle (street/drag/circuit?)

anyone answer without that info is a guess

Big dollar build, best option would be split pluse housing. Need good exhaust manifold housing thats split pluse design. Garrett now makes rear housings that do that which are v-band on both connectons

Two options .61 divided or .83



.61 would be for street, earlier spool
.83 would be for track or if running big cams

Atpturbo.com is where you buy from

Hi guys im looking at turbos at the moment,i have decided on the new garrett gtx3076r but don't know a thing about A/R's.My ca18det will be stroked and 40 thou over,1mm oversize valves in both inlet and exhaust no porting just a polish.Also ill be just running 98ron fuel as I cant get e85 in town,could anyone explain which A/R to go for.