Doesn't have to be T4 only to run in the SFWD class NHRA or T3 are ok also?

 

So its ok to run any turbo size in the SFWD class?

 

i thought a t3 exh housing was the largest?

 

from the rule book. turbine must utilize an inlet flange refered to as a t04. may be smaller but may never exceed the t04 in any direction. limmited to a 72mm turbo.

so i guess a T04 would be the same as a T4 flange. huh. i thought they were only to be a T3 flange.