Currently building an RB26 N1 and am wondering on the best options of Full-Race's EFR twin kits (Already ruled out the single 8374)
Have a 2.8L stroker, HKS V-cam setup and dry sump planned and am debating between twin 6258s/6758s/7163s
Curious as to each kit's output on 91 octane (AKI) and E85, before I make any decision (I also haven't decided on how much power I want haha)
Thanks in advance